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1

Approximate Uni-directional Benders Decomposition  

E-Print Network [OSTI]

tention of visiting as many markets as is necessary to meet demand for a set of ... K. The markets may have lim- ited quantities of each product (capacity C).

C N Burt, N Lipovetzky, A R Pearce, P J Stuckey

2014-12-01T23:59:59.000Z

2

Property:Wave Direction | Open Energy Information  

Open Energy Info (EERE)

Direction Direction Jump to: navigation, search Property Name Wave Direction Property Type String Pages using the property "Wave Direction" Showing 25 pages using this property. (previous 25) (next 25) A Alden Small Flume + Uni-Directional + Alden Wave Basin + Both + C Carderock Maneuvering & Seakeeping Basin + Both + Carderock Tow Tank 2 + Uni-Directional + Carderock Tow Tank 3 + Uni-Directional + Chase Tow Tank + Uni-Directional + Coastal Harbors Modeling Facility + Uni-Directional + Coastal Inlet Model Facility + Uni-Directional + Coastal Structures Modeling Complex + Both + D Davidson Laboratory Tow Tank + Uni-Directional + DeFrees Large Wave Basin + Uni-Directional + DeFrees Small Wave Basin + Uni-Directional + H Haynes Wave Basin + Both +

3

Adaptive Comfort Model: Simulations & Future Directions  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Adaptive Comfort Model: Simulations & Future Directions Adaptive Comfort Model: Simulations & Future Directions Speaker(s): Richard de Dear Date: February 4, 2011 - 12:00pm Location: 90-4133 Seminar Host/Point of Contact: Philip Haves The last 20 years of thermal comfort have witnessed a shift away from the "static" approach (exemplified by the PMV/PPD model) towards the adaptive approach (exemplified by the adaptive models in ASHRAE's Standard 55 (2004, 2010) and the European Union's counterpart standard, EN15251 (2007). - the basis and derivation of the adaptive comfort model - adaptive comfort standards (ASHRAE 55 and EN15251) - new developments and directions (reporting back from the January 2011 ASHRAE Meeting of SSPC-55 in Las Vegas) - environmental variables other than dry bulb, in the adaptive model

4

Direct numerical simulation of turbulent reacting flows  

SciTech Connect (OSTI)

The development of turbulent combustion models that reflect some of the most important characteristics of turbulent reacting flows requires knowledge about the behavior of key quantities in well defined combustion regimes. In turbulent flames, the coupling between the turbulence and the chemistry is so strong in certain regimes that is is very difficult to isolate the role played by one individual phenomenon. Direct numerical simulation (DNS) is an extremely useful tool to study in detail the turbulence-chemistry interactions in certain well defined regimes. Globally, non-premixed flames are controlled by two limiting cases: the fast chemistry limit, where the turbulent fluctuations. In between these two limits, finite-rate chemical effects are important and the turbulence interacts strongly with the chemical processes. This regime is important because industrial burners operate in regimes in which, locally the flame undergoes extinction, or is at least in some nonequilibrium condition. Furthermore, these nonequilibrium conditions strongly influence the production of pollutants. To quantify the finite-rate chemistry effect, direct numerical simulations are performed to study the interaction between an initially laminar non-premixed flame and a three-dimensional field of homogeneous isotropic decaying turbulence. Emphasis is placed on the dynamics of extinction and on transient effects on the fine scale mixing process. Differential molecular diffusion among species is also examined with this approach, both for nonreacting and reacting situations. To address the problem of large-scale mixing and to examine the effects of mean shear, efforts are underway to perform large eddy simulations of round three-dimensional jets.

Chen, J.H. [Sandia National Laboratories, Livermore, CA (United States)

1993-12-01T23:59:59.000Z

5

Direct numerical simulations of aeolian sand ripples  

E-Print Network [OSTI]

Aeolian sand beds exhibit regular patterns of ripples resulting from the interaction between topography and sediment transport. Their characteristics have been so far related to reptation transport caused by the impacts on the ground of grains entrained by the wind into saltation. By means of direct numerical simulations of grains interacting with a wind flow, we show that the instability turns out to be driven by resonant grain trajectories, whose length is close to a ripple wavelength and whose splash leads to a mass displacement towards the ripple crests. The pattern selection results from a compromise between this destabilizing mechanism and a diffusive downslope transport which stabilizes small wavelengths. The initial wavelength is set by the ratio of the sediment flux and the erosion/deposition rate, a ratio which increases linearly with the wind velocity. We show that this scaling law, in agreement with experiments, originates from an interfacial layer separating the saltation zone from the static sand bed, where momentum transfers are dominated by mid-air collisions. Finally, we provide quantitative support for the use the propagation of these ripples as a proxy for remote measurements of sediment transport.

Orencio Duran; Philippe Claudin; Bruno Andreotti

2014-11-07T23:59:59.000Z

6

A goal directed simulation method using fuzzy cognitive mapping  

E-Print Network [OSTI]

was constructed using the C++ programming language and the EXSYS expert system shell. All simulation models were constructed and analyzed using ARENA simulation software. Additional analyses were conducted using Excel spreadsheets. A goal directed system...

Deines, Erich Vernon

2012-06-07T23:59:59.000Z

7

Direct Numerical Simulations and Robust Predictions of Cloud...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the center of the bubble cloud. Credit: Computational Science and Engineering Laboratory, ETH Zurich, Switzerland Direct Numerical Simulations and Robust Predictions of Cloud...

8

Direct Simulation of Shock Layer Plasmas  

SciTech Connect (OSTI)

Approximate models of the electric field used with the DSMC method all impose quasi-neutrality everywhere in the shock layer plasma. The shortcomings of these models are examined in this study by simulating a weak shock layer plasma with a coupled DSMC-Particle-In-Cell (PIC) method. The stagnation streamline of an axisymmetric shock layer is simulated for entry velocities in air that correspond to both lunar and Mars return trajectories. The atmospheric densities, particle diameters and chemical reaction rates are varied from the actual values to make the computations tractable while retaining the mean free path of air at 85 km altitude. In contrast to DSMC flow field predictions, regions of non-neutrality are predicted by the DSMC-PIC method, and the electrons are predicted to be isothermal. Perhaps the most important result of this study is that the DSMC-PIC results at both reentry energies yield a 14% increase in heat flux to the vehicle surface relative to the DSMC results. Rather unintuitively, this is mostly due to an increase in ion flux to the surface, rather than the potential energy gained by each ion as it traverses the plasma sheath. In this study, an approximate electric field model is presented, with the goal of accounting for this heat flux augmentation without the need for a computationally expensive DSMC-PIC calculation of the entire flow-field. Convective heat flux results obtained with new electric field model are compared to results from the rigorous DSMC-PIC calculations.

Farbar, E. D.; Boyd, I. D. [Dept. of Aerospace Engineering, University of Michigan, 1320 Beal Ave., Ann Arbor MI, 48109 (United States)

2011-05-20T23:59:59.000Z

9

DIRECT NUMERICAL SIMULATION OF INTERACTION OF DETONATION WAVE WITH HOMOGENEOUS  

E-Print Network [OSTI]

DIRECT NUMERICAL SIMULATION OF INTERACTION OF DETONATION WAVE WITH HOMOGENEOUS ISOTROPIC TURBULENCE SIMULATION OF INTERACTION OF DETONATION WAVE WITH HOMOGENEOUS ISOTROPIC TURBULENCE HARI NARAYANAN NAGARAJAN The propagation of a shock or detonation wave through a reactive mixture has been the subject of research for over

Texas at Arlington, University of

10

Detonation shock dynamics and comparisons with direct numerical simulation  

E-Print Network [OSTI]

Detonation shock dynamics and comparisons with direct numerical simulation Tariq D. Aslam # , and D­ nation and detonation shock dynamics (DSD) is made. The theory of DSD defines the motion of the detonation shock in terms of intrinsic geometry of the shock surface, in particular for condensed phase ex

Aslam, Tariq

11

Detonation shock dynamics and comparisons with direct numerical simulation  

E-Print Network [OSTI]

Detonation shock dynamics and comparisons with direct numerical simulation Tariq D. Aslam , and D- nation and detonation shock dynamics (DSD) is made. The theory of DSD defines the motion of the detonation shock in terms of intrinsic geometry of the shock surface, in particular for condensed phase ex

Aslam, Tariq

12

Petascale Direct Numerical Simulations of Turbulent Channel Flow  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Petascale Petascale Direct Numerical Simulations of Turbulent Channel Flow MyoungKyu Lee mk@ices.utexas.edu Department of Mechanical Engineering University of Texas at Austin ESP Meeting May, 2013 M.K. Lee (Univ of Texas, Austin) Petascale DNS of Turbulent Channel Flow ESP Meeting May, 2013 1 / 30 Contents Project Overview Performance Optimization Early Result Conclusion M.K. Lee (Univ of Texas, Austin) Petascale DNS of Turbulent Channel Flow ESP Meeting May, 2013 2 / 30 Project Overview Project Title ◮ Petascale Direct Numerical Simulations of Turbulent Channel Flow Goal ◮ Expanding our understand of wall-bounded turbulence Personnel ◮ P.I. : Robert Moser ◮ Primary Developer : M.K.Lee ◮ Software Engineering Support : Nicholas Malaya ◮ Catalyst : Ramesh Balakrishnan M.K. Lee (Univ of Texas, Austin) Petascale DNS of Turbulent Channel Flow ESP Meeting May, 2013 3 / 30 Turbulent

13

Fluid simulations with localized boltzmann upscaling by direct simulation Monte-Carlo  

Science Journals Connector (OSTI)

In the present work, we present a novel numerical algorithm to couple the Direct Simulation Monte Carlo method (DSMC) for the solution of the Boltzmann equation with a finite volume like method for the solution of the Euler equations. Recently we presented ... Keywords: Boltzmann equation, Kinetic-fluid coupling, Monte Carlo methods, Multiscale problems

Pierre Degond; Giacomo Dimarco

2012-03-01T23:59:59.000Z

14

Large-scale simulations on multiple Graphics Processing Units (GPUs) for the direct simulation Monte Carlo method  

Science Journals Connector (OSTI)

In this study, the application of the two-dimensional direct simulation Monte Carlo (DSMC) method using an MPI-CUDA parallelization paradigm on Graphics Processing Units (GPUs) clusters is presented. An all-device (i.e. GPU) computational approach is ... Keywords: Graphics Processing Unit (GPU), MPI-CUDA, Parallel direct simulation Monte Carlo, Rarefied gas dynamics, Very large-scale simulation

C. -C. Su; M. R. Smith; F. -A. Kuo; J. -S. Wu; C. -W. Hsieh; K. -C. Tseng

2012-10-01T23:59:59.000Z

15

DIPOLE COLLAPSE AND DYNAMO WAVES IN GLOBAL DIRECT NUMERICAL SIMULATIONS  

SciTech Connect (OSTI)

Magnetic fields of low-mass stars and planets are thought to originate from self-excited dynamo action in their convective interiors. Observations reveal a variety of field topologies ranging from large-scale, axial dipoles to more structured magnetic fields. In this article, we investigate more than 70 three-dimensional, self-consistent dynamo models in the Boussinesq approximation obtained by direct numerical simulations. The control parameters, the aspect ratio, and the mechanical boundary conditions have been varied to build up this sample of models. Both strongly dipolar and multipolar models have been obtained. We show that these dynamo regimes in general can be distinguished by the ratio of a typical convective length scale to the Rossby radius. Models with a predominantly dipolar magnetic field were obtained, if the convective length scale is at least an order of magnitude larger than the Rossby radius. Moreover, we highlight the role of the strong shear associated with the geostrophic zonal flow for models with stress-free boundary conditions. In this case the above transition disappears and is replaced by a region of bistability for which dipolar and multipolar dynamos coexist. We interpret our results in terms of dynamo eigenmodes using the so-called test-field method. We can thus show that models in the dipolar regime are characterized by an isolated 'single mode'. Competing overtones become significant as the boundary to multipolar dynamos is approached. We discuss how these findings relate to previous models and to observations.

Schrinner, Martin; Dormy, Emmanuel [MAG (ENS/IPGP), LRA, Ecole Normale Superieure, 24 Rue Lhomond, 75252 Paris Cedex 05 (France); Petitdemange, Ludovic, E-mail: martin@schrinner.eu [Previously at Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, 69117 Heidelberg, Germany. (Germany)

2012-06-20T23:59:59.000Z

16

Direct Numerical Simulations in Engine-like Geometries | Argonne...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Location: Argonne National Laboratory Speaker(s): Martin Schmitt Speaker(s) Title: ETH Zurich Engine simulations based on RANS and LES depend on the mesh resolution and...

17

Effect of fluctuating wind direction on cross natural ventilation in buildings from large eddy simulation  

E-Print Network [OSTI]

wind direction, and the simulated results agree reasonably with the corresponding experimental data is the use of small-scale models in a wind tunnel to simulate natural ventilation. In general, the mean flow1 Effect of fluctuating wind direction on cross natural ventilation in buildings from large eddy

Chen, Qingyan "Yan"

18

Stochastic Microstructure Reconstruction and Direct Numerical Simulation of the PEFC Catalyst Layer  

E-Print Network [OSTI]

Stochastic Microstructure Reconstruction and Direct Numerical Simulation of the PEFC Catalyst Layer, USA A direct numerical simulation DNS model of species and charge transport in the cathode catalyst of the catalyst layer has been reconstructed based on a stochastic technique using the low-order statistical

19

Direct Numerical Simulation of a Hypersonic Turbulent Boundary Layer on a Large Domain  

E-Print Network [OSTI]

Direct Numerical Simulation of a Hypersonic Turbulent Boundary Layer on a Large Domain Stephan Priebe , M. Pino Mart´in The direct numerical simulation (DNS) of a spatially-developing hypersonic There are few studies of hypersonic flows at Mach number greater than 5 and few involve the measurement of mean

Martín, Pino

20

Direct Simulation Monte Carlo of Inductively Coupled Plasma and Comparison with Experiments  

E-Print Network [OSTI]

Direct Simulation Monte Carlo of Inductively Coupled Plasma and Comparison with Experiments Justine of Chemical Engineering, University of Houston, Houston, Texas 77204-4 792, USA ABSTRACT Direct simulation-density inductively coupled reactor with chlorine (electronegative) chemistry. Electron density and temperature were

Economou, Demetre J.

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

DIRECT NUMERICAL SIMULATION OF HOT AND HIGHLY PULSATED  

E-Print Network [OSTI]

. We focus here on situations where plasma jets are randomly forced by an electric arc resulting pulsated jet flows at 12 000 K developing in a colder environment. Such flows are used to model plasma jets generated by direct current plasma torch. Plasma spraying is used to deposit thick coatings on a substrate

Sart, Remi

22

The Development of A Human Systems Simulation Laboratory: Strategic Direction  

SciTech Connect (OSTI)

The Human System Simulation Laboratory (HSSL) at the Idaho National Laboratory is one of few facilities of its kind that allows human factors researchers to evaluate various aspects of human performance and human system interaction for proposed reactor designs and upgrades. A basic system architecture, physical configuration and simulation capability were established to enable human factors researchers to support multiple, simultaneous simulations and also different power plant technologies. Although still evolving in terms of its technical and functional architecture, the HSSL is already proving its worth in supporting current and future nuclear industry needs for light water reactor sustainability and small modular reactors. The evolution of the HSSL is focused on continual physical and functional refinement to make it a fully equipped, reconfigurable facility where advanced research, testing and validation studies can be conducted on a wider range of reactor technologies. This requires the implementation of additional plant models to produce empirical research data on human performance with emerging human-system interaction technologies. Additional beneficiaries of this information include system designers and HRA practitioners. To ensure that results of control room crew studies will be generalizable to the existing and evolving fleet of US reactors, future expansion of the HSSL may also include other SMR plant models, plant-specific simulators and a generic plant model aligned to the current generation of pressurized water reactors (PWRs) and future advanced reactor designs. Collaboration with industry partners is also proving to be a vital component of the facility as this helps to establish a formal basis for current and future human performance experiments to support nuclear industry objectives. A long-range Program Plan has been developed for the HSSL to ensure that the facility will support not only the Department of Energys Light Water Reactor Sustainability Program, but also to provide human factors guidance for all future developments of the nuclear industry.

Jacques Hugo; Katya le Blanc; David Gertman

2012-07-01T23:59:59.000Z

23

A Detailed Multi-Zone Thermodynamic Simulation For Direct-Injection Diesel Engine Combustion  

E-Print Network [OSTI]

A detailed multi-zone thermodynamic simulation has been developed for the direct-injection (DI) diesel engine combustion process. For the purpose of predicting heterogeneous type combustion systems, the model explores the formation of pre...

Xue, Xingyu 1985-

2012-11-15T23:59:59.000Z

24

Analysis of Borderline Substitution/Electron Transfer Pathways from Direct ab initio MD Simulations  

SciTech Connect (OSTI)

Ab initio molecular dynamics simulations were carried out for the borderline reaction pathways in the reaction of CH2O?- with CH3Cl. The simulations reveal distinctive features of three types of mechanisms passing through the SN2-like transition state (TS): (i) a direct formation of SN2 products, (ii) a direct formation of ET products, and (iii) a 2-step formation of ET products via the SN2 valley. The direct formation of the ET product through the SN2-like TS appears to be more favorable at higher temperatures. The 2-step process depends on the amount of energy that goes into the C-C stretching mode.

Yamataka, H (Osaka University, Japan); Aida, M A. (Department of Chemistry, Graduate School of Science, Hiroshima University); Dupuis, Michel (BATTELLE (PACIFIC NW LAB))

2001-12-01T23:59:59.000Z

25

Direct Simulations of Homogeneous Bubble Nucleation: Agreement with CNT and no Local Hot Spots  

E-Print Network [OSTI]

We present results from direct, large-scale molecular dynamics (MD) simulations of homogeneous bubble (liquid-to-vapor) nucleation. The simulations contain half a billion Lennard-Jones (LJ) atoms and cover up to 56 million time-steps. The unprecedented size of the simulated volumes allows us to resolve the nucleation and growth of many bubbles per run in simple direct micro-canonical (NVE) simulations while the ambient pressure and temperature remain almost perfectly constant. We find bubble nucleation rates which are lower than in most of the previous, smaller simulations. It is widely believed that classical nucleation theory (CNT) generally underestimates bubble nucleation rates by very large factors. However, our measured rates are within two orders of magnitude of CNT predictions - only at very low temperatures does CNT underestimate the nucleation rate significantly. Introducing a small, positive Tolman length leads to very good agreement at all temperatures, as found in our recent vapor-to-liquid nucle...

Diemand, Jrg; Tanaka, Kyoko K; Tanaka, Hidekazu

2014-01-01T23:59:59.000Z

26

Direct Numerical Simulation of Autoiginition of a Hydrogen Jet in a  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct Numerical Simulation of Autoiginition of a Hydrogen Jet in a Direct Numerical Simulation of Autoiginition of a Hydrogen Jet in a Preheated Cross Flow Submitted by mkaczmar on June 4, 2013 - 13:52 Authors: Abdilghanie, A., Frouzakis, C.E., Fischer, P Autoignition of a nitrogen-diluted hydrogen mixture issuing from a round nozzle into a cross-flowing turbulent stream of preheated air flowing in a channel at a friction Reynolds number Re = 180 is inves- tigated via 3-D direct numerical simulations (DNS) at two crossflow stream temperatures (930 and 950 K). Three-dimensional visualizations of the JICF reveal a complicated flow structure characterized by a variety of coherent vortical structures resulting from the boundary layers near the walls and evolving from the jet instabilities. The mean pressure field set up by the flow

27

A Java-Based Direct Monte Carlo Simulation of a Nano-Scale Pulse Detonation Engine  

E-Print Network [OSTI]

A Java-Based Direct Monte Carlo Simulation of a Nano- Scale Pulse Detonation Engine Darryl J. Here, the pulse detonation engine is proposed as a means of propulsion for micro-air vehicles and nano attempting to implement the pulse detonation engine at such small length scales is the dominance of the wall

28

Solar Energy 74 (2003) 157173 Comparison between ray-tracing simulations and bi-directional  

E-Print Network [OSTI]

Solar Energy 74 (2003) 157­173 Comparison between ray-tracing simulations and bi-Louis Scartezzini a Solar Energy and Building Physics Laboratory LESO-PB, Swiss Federal Institute of Technology EPFL-tracing software. For the first time, an attempt is made to validate detailed bi-directional properties

29

RNAthermsw: Direct Temperature Simulations for Predicting the Location of RNA Thermometers  

E-Print Network [OSTI]

RNAthermsw: Direct Temperature Simulations for Predicting the Location of RNA Thermometers, Ben-Gurion University, Beer-Sheva, Israel Abstract The mechanism of RNA thermometers is a subject. The detection of RNA thermometers in various genes of interest is valuable as it could lead to the discovery

Barash, Danny

30

Transient Simulations of Spouted Fluidized Bed for Coal-Direct Chemical Looping Combustion  

Science Journals Connector (OSTI)

Transient Simulations of Spouted Fluidized Bed for Coal-Direct Chemical Looping Combustion ... Instead of having air to support the combustion process, an oxygen compound (metal or non-metal based) is used as an oxidizer in the fuel reactor; thus, the fuel is chemically combusted by the metal oxide than the oxygen present in air in case of standard power plants. ... The CFD/DEM simulation approach has been used in various applications which require the modeling of particle/fluid interaction;(19-23) however, its application in the context of close-loop spouted fluidized bed system has so far been quite limited and preliminary. ...

Zheming Zhang; Ling Zhou; Ramesh Agarwal

2014-01-28T23:59:59.000Z

31

Using Direct Sub-Level Entity Access to Improve Nuclear Stockpile Simulation Modeling  

SciTech Connect (OSTI)

Direct sub-level entity access is a seldom-used technique in discrete-event simulation modeling that addresses the accessibility of sub-level entity information. The technique has significant advantages over more common, alternative modeling methods--especially where hierarchical entity structures are modeled. As such, direct sub-level entity access is often preferable in modeling nuclear stockpile, life-extension issues, an area to which it has not been previously applied. Current nuclear stockpile, life-extension models were demonstrated to benefit greatly from the advantages of direct sub-level entity access. In specific cases, the application of the technique resulted in models that were up to 10 times faster than functionally equivalent models where alternative techniques were applied. Furthermore, specific implementations of direct sub-level entity access were observed to be more flexible, efficient, functional, and scalable than corresponding implementations using common modeling techniques. Common modeling techniques (''unbatch/batch'' and ''attribute-copying'') proved inefficient and cumbersome in handling many nuclear stockpile modeling complexities, including multiple weapon sites, true defect analysis, and large numbers of weapon and subsystem types. While significant effort was required to enable direct sub-level entity access in the nuclear stockpile simulation models, the enhancements were worth the effort--resulting in more efficient, more capable, and more informative models that effectively addressed the complexities of the nuclear stockpile.

Robert Y. Parker

1999-08-01T23:59:59.000Z

32

Direct Numerical Simulations of Nonlinear Evolution of MHD Instability in LHD  

SciTech Connect (OSTI)

Nonlinear evolutions of MHD instabilities in the large helical device are studied by means of direct numerical simulations under the vacuum configuration with the magnetic axis position R = 3.6m, including effects of its full three-dimensional geometry, flows parallel to the magnetic field lines and the fluid compressibility. The linear growth of the pressure-driven modes and their nonlinear saturations are observed. The linear growth brings about the flows parallel to the magnetic field lines as strong as the perpendicular flows. The fluid compressibility reduces the linear growth rate significantly. In the nonlinear saturation process, a qualitative difference is found in the behaviors of the parallel and perpendicular flows. The plasma appears to approach to a near-equilibrium state, keeping finite amplitudes of the parallel flow. Our numerical results highlight important roles of the parallel flow and compressibility in nonlinear MHD simulations in the large helical device.

Miura, H.; Nakajima, N.; Hayashi, T. [National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu 509-5292 (Japan); Department of Fusion Science, The Graduate University for Advanced Studies (SOKENDAI), 322-6 Oroshi, Toki, Gifu 509-5292 (Japan); Okamoto, M. [Department of Information Science, Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501 (Japan)

2006-11-30T23:59:59.000Z

33

Statistically Steady Turbulence in Soap Films: Direct Numerical Simulations with Ekman Friction  

E-Print Network [OSTI]

We present a detailed direct numerical simulation (DNS) designed to investigate the combined effects of walls and Ekman friction on turbulence in forced soap films. We concentrate on the forward-cascade regime and show how to extract the isotropic parts of velocity and vorticity structure functions and thence the ratios of multiscaling exponents. We find that velocity structure functions display simple scaling whereas their vorticity counterparts show multiscaling; and the probability distribution function of the Weiss parameter $\\Lambda$, which distinguishes between regions with centers and saddles, is in quantitative agreement with experiments.

Prasad Perlekar; Rahul Pandit

2008-11-09T23:59:59.000Z

34

Direct  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

interactions, and the pollutant emission is hence directly proportional to the bulk neutral density. Simultaneously monitoring the total emission at 1040 nm and the...

35

Simulation of an Ar/NH{sub 3} low pressure magnetized direct current discharge  

SciTech Connect (OSTI)

A two-dimensional fluid model has been used to investigate the properties of plasma in an Ar/NH{sub 3} low pressure magnetized direct current discharge. We compared the simulation results with the theoretical and experimental results of the other gas discharge in which the magnetic field is considered. Results that obtained using this method are in good agreement with literature. The simulation results show that the positive ammonia ion density follows the positive argon ion density. The Ar{sub 2}{sup +} density is slightly higher than the Ar{sup +} density at 100 mTorr. The largest ammonia ion is NH{sub 3}{sup +} ion, followed by NH{sub 2}{sup +}, NH{sub 4}{sup +}, and NH{sup +} ions. The contribution of NH{sup +} ions to the density of the positive ammonia ions is marginal. The influence of pressure on the plasma discharge has been studied by simulation, and the mechanisms have been discussed. The average plasma density increases as pressure increased. The plasma density appears to be more inhomogeneous than that at the lower pressure. The ratio of charge particles changed as pressure increased. The Ar{sup +} density is slightly higher than the Ar{sub 2}{sup +} density as the pressure increased. It makes NH{sub 4}{sup +} ratio increase as pressure increased. It shows that the electron temperature drops with rising pressure by numerical calculation.

Li Zhi [School of Science, University of Science and Technology Liaoning, Anshan 114051 (China); School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024 (China); Zhao Zhen [School of Chemistry and Life Science, Anshan Normal University, Anshan 114007 (China); School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051 (China); Li Xuehui [Physiccal Science and Technical College, Dalian University, Dalian 116622 (China)

2013-01-15T23:59:59.000Z

36

Field simulation of axisymmetric plasma screw pinches by alternating-direction-implicit methods  

SciTech Connect (OSTI)

An axisymmetric plasma screw pinch is an axisymmetric column of ionized gaseous plasma radially confined by forces from axial and azimuthal currents driven in the plasma and its surroundings. This dissertation is a contribution to detailed, high resolution computer simulation of dynamic plasma screw pinches in 2-d {ital rz}-coordinates. The simulation algorithm combines electron fluid and particle-in-cell (PIC) ion models to represent the plasma in a hybrid fashion. The plasma is assumed to be quasineutral; along with the Darwin approximation to the Maxwell equations, this implies application of Ampere`s law without displacement current. Electron inertia is assumed negligible so that advective terms in the electron momentum equation are ignored. Electrons and ions have separate scalar temperatures, and a scalar plasma electrical resistivity is assumed. Altemating-direction-implicit (ADI) methods are used to advance the electron fluid drift velocity and the magnetic fields in the simulation. The ADI methods allow time steps larger than allowed by explicit methods. Spatial regions where vacuum field equations have validity are determined by a cutoff density that invokes the quasineutral vacuum Maxwell equations (Darwin approximation). In this dissertation, the algorithm was first checked against ideal MM stability theory, and agreement was nicely demonstrated. However, such agreement is not a new contribution to the research field. Contributions to the research field include new treatments of the fields in vacuum regions of the pinch simulation. The new treatments predict a level of magnetohydrodynamic turbulence near the bulk plasma surface that is higher than predicted by other methods.

Lambert, M.A.

1996-06-01T23:59:59.000Z

37

A Review of Direct Numerical Simulations of Astrophysical Detonations and Their Implications  

SciTech Connect (OSTI)

Multi-dimensional direct numerical simulations (DNS) of astrophysical detonations in degenerate matter have revealed that the nuclear burning is typically characterized by cellular structure caused by transverse instabilities in the detonation front. Type Ia supernova modelers often use one- dimensional DNS of detonations as inputs or constraints for their whole star simulations. While these one-dimensional studies are useful tools, the true nature of the detonation is multi-dimensional. The multi-dimensional structure of the burning influences the speed, stability, and the composition of the detonation and its burning products, and therefore, could have an impact on the spectra of Type Ia supernovae. Considerable effort has been expended modeling Type Ia supernovae at densities above 1 107 g cm 3 where the complexities of turbulent burning dominate the flame propagation. However, most full star models turn the nuclear burning schemes off when the density falls below 1 107 g cm 3 and distributed burning begins. The deflagration to detonation transition (DDT) is believed to occur at just these densities and consequently they are the densities important for studying the properties of the subsequent detonation. This work will review the status of DNS studies of detonations and their possible implications for Type Ia supernova models. It will cover the development of Detonation theory from the first simple Chapman-Jouguet (CJ) detonation models to the current models based on the time-dependent, compressible, reactive flow Euler equations of fluid dynamics.

Parete-Koon, Suzanne T [ORNL; Messer, Bronson [ORNL; Smith, Chris R [ORNL; Papatheodore, Thomas L [ORNL

2013-01-01T23:59:59.000Z

38

Two Dimensional Simulations of Plastic-Shell, Direct-Drive Implosions on OMEGA  

SciTech Connect (OSTI)

Multidimensional hydrodynamic properties of high-adiabat direct-drive plastic-shell implosions on the OMEGA laser system [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] are investigated using the multidimensional hydrodynamic code, DRACO. Multimode simulations including the effects of nonuniform illumination and target roughness indicate that shell stability during the acceleration phase plays a critical role in determining target performance. For thick shells that remain integral during the acceleration phase, target yields are significantly reduced by the combination of the long-wavelength ({ell} < 10) modes due to surface roughness and beam imbalance and the intermediate modes (20 {le} {ell} {le} 50) due to single-beam nonuniformities. The neutron-production rate for these thick shells truncates relative to one-dimensional (1-D) predictions. The yield degradation in the thin shells is mainly due to shell breakup at short wavelengths ({lambda} {approx} {Delta}, where {Delta} is the in-flight shell thickness). The neutron-rate curves for the thinner shells have significantly lower amplitudes and a fall-off that is less steep than 1-D rates. DRACO simulation results are consistent with experimental observations.

Radha, P B; Goncharov, V N; Collins, T B; Delettrez, J A; Elbaz, Y; Glebov, V Y; Keck, R L; Keller, D E; Knauer, J P; Marozas, J A; Marshall, F J; McKenty, P W; Meyerhofer, D D; Regan, S P; Sangster, T C; Shvarts, D; Skupsky, S; Srebro, Y; Town, R J; Stoeckl, C

2004-09-27T23:59:59.000Z

39

WENO-enhanced gas-kinetic scheme for direct simulations of compressible transition and turbulence  

SciTech Connect (OSTI)

The recently developed Gas Kinetic Method (GKM) for computing fluid flow is enhanced with advanced reconstruction (interpolation) schemes to enable direct simulations of highly compressible transition and turbulence fields. Variants of Weighted Essentially Non-Oscillatory (WENO) reconstruction schemes of different orders of accuracy are implemented and examined along with more elementary van Leer method. The competing schemes are evaluated for their accuracy, efficiency and numerical stability. The computed results are compared against the Rapid Distortion Theory for the case of compressible shear turbulence and 'pressure-released' Burgers solution. In the case of decaying isotropic turbulence, the efficacy of the reconstruction schemes is evaluated by comparison against a 'gold standard' high-resolution simulation. The capabilities of the reconstruction schemes to capture linear, non-linear, pressure-released and viscous flow physics as well as solenoidal and dilatational features of the flow fields are established in isolation and combination. The most suitable WENO variant for integration with GKM is identified. Another important outcome of the study is the finding that temperature-interpolation is superior to energy-interpolation in avoiding negative temperatures arising due to the Gibbs phenomenon. Overall, this work advances the applicability of kinetic theory based GKM to a wider range of high Mach number flow physics.

Kumar, G., E-mail: gauravkr@tamu.edu [Department of Aerospace Engineering, Texas A and M University, College Station, TX 77843 (United States); Girimaji, S.S., E-mail: girimaji@tamu.edu [Department of Aerospace Engineering, Texas A and M University, College Station, TX 77843 (United States); Kerimo, J. [Department of Aerospace Engineering, Texas A and M University, College Station, TX 77843 (United States)] [Department of Aerospace Engineering, Texas A and M University, College Station, TX 77843 (United States)

2013-02-01T23:59:59.000Z

40

Direct numerical simulations of type Ia supernovae flames I: The landau-darrieus instability  

SciTech Connect (OSTI)

Planar flames are intrinsically unstable in open domains due to the thermal expansion across the burning front--the Landau-Darrieus instability. This instability leads to wrinkling and growth of the flame surface, and corresponding acceleration of the flame, until it is stabilized by cusp formation. We look at the Landau-Darrieus in stability for C/O thermonuclear flames at conditions relevant to the late stages of a Type Ia supernova explosion. Two-dimensional direct numerical simulations of both single-mode and multi-mode perturbations using a low Mach number hydrodynamics code are presented. We show the effect of the instability on the flame speed as a function of both the density and domain size, demonstrate the existence of the small scale cutoff to the growth of the instability, and look for the proposed breakdown of the non-linear stabilization at low densities. The effects of curvature on the flame as quantified through measurements of the growth rate and computation of the corresponding Markstein number. While accelerations of a few percent are observed, they are too small to have any direct outcome on the supernova explosion.

Bell, J.B.; Day, M.S.; Rendleman, C.A.; Woosley, S.E.; Zingale, M.

2003-11-24T23:59:59.000Z

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41

Direct simulation of proton-coupled electron transfer across multiple regimes  

SciTech Connect (OSTI)

The coupled transfer of electrons and protons is a central feature of biological and molecular catalysis, yet fundamental aspects of these reactions remain poorly understood. In this study, we extend the ring polymer molecular dynamics (RPMD) method to enable direct simulation of proton-coupled electron transfer (PCET) reactions across a wide range of physically relevant regimes. In a system-bath model for symmetric, co-linear PCET in the condensed phase, RPMD trajectories reveal distinct kinetic pathways associated with sequential and concerted PCET reaction mechanisms, and it is demonstrated that concerted PCET proceeds by a solvent-gating mechanism in which the reorganization energy is mitigated by charge cancellation among the transferring particles. We further employ RPMD to study the kinetics and mechanistic features of concerted PCET reactions across multiple coupling regimes, including the fully non-adiabatic (both electronically and vibrationally non-adiabatic), partially adiabatic (electronically adiabatic, but vibrationally non-adiabatic), and fully adiabatic (both electronically and vibrationally adiabatic) limits. Comparison of RPMD with the results of PCET rate theories demonstrates the applicability of the direct simulation method over a broad range of conditions; it is particularly notable that RPMD accurately predicts the crossover in the thermal reaction rates between different coupling regimes while avoiding a priori assumptions about the PCET reaction mechanism. Finally, by utilizing the connections between RPMD rate theory and semiclassical instanton theory, we show that analysis of ring-polymer configurations in the RPMD transition path ensemble enables the a posteriori determination of the coupling regime for the PCET reaction. This analysis reveals an intriguing and distinct 'transient-proton-bridge' mechanism for concerted PCET that emerges in the transition between the proton-mediated electron superexchange mechanism for fully non-adiabatic PCET and the hydrogen atom transfer mechanism for partially adiabatic PCET. Taken together, these results provide a unifying picture of the mechanisms and physical driving forces that govern PCET across a wide range of physical regimes, and they raise the possibility for PCET mechanisms that have not been previously reported.

Kretchmer, Joshua S.; Miller, Thomas F. III [Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125 (United States)

2013-04-07T23:59:59.000Z

42

Finite-rate chemistry and transient effects in direct numerical simulations of turbulent nonpremixed flames  

SciTech Connect (OSTI)

Three-dimensional direct numerical simulations (DNS) of turbulent nonpremixed flames including finite-rate chemistry and heat release effects were performed. Two chemical reaction models were considered: (1) a single-step global reaction model in which the heat release and activation energy parameters are typical combustion applications, and (2) a two-step reaction model to stimulate radical production and consumption and to compare against the single-step model. The model problem consists of the interaction between an initially unstained laminar diffusion flame and a three-dimensional field of homogeneous turbulence. Conditions ranging from fast chemistry to the pure mixing limit were studied by varying a global Damkoehler number. Results suggest that turbulence-induced mixing acting along the stoichiometric line leads to a strong modification of the inner structure of the turbulent flame compared with a laminar strained flame, resulting in intermediate species concentrations well above the laminar prediction. This result is consistent the experimental observations. Comparison of the response of the turbulent flame structure due to changes in the scalar dissipation rate with a steady strained laminar flame reveals that unsteady strain rates experienced by the turbulent flame may be responsible for h3e observed high concentrations of reaction intermediates.

Mahalingam, S. [Univ. of Colorado, Boulder, CO (United States). Center for Combustion Research] [Univ. of Colorado, Boulder, CO (United States). Center for Combustion Research; Chen, J.H. [Sandia National Labs., Livermore, CA (United States). Combustion Research Facility] [Sandia National Labs., Livermore, CA (United States). Combustion Research Facility; Vervisch, L. [CORIA, Rouen (France). Laboratoire de Mechanique des Fluides Numeriques] [CORIA, Rouen (France). Laboratoire de Mechanique des Fluides Numeriques

1995-08-01T23:59:59.000Z

43

New directions in photonics simulation: Lanczos recursion and finite-difference time-domain  

SciTech Connect (OSTI)

Computational Integrated Photonics (CIP) is the area of computational physics that treats the propagation of light in optical fibers and in integrated optical circuits. The purpose of integrated photonics simulation is to develop the computational tools that will support the design of photonic and optoelectronic integrated devices. CIP has, in general, two thrusts: (1) predictive models of photonic device behavior that can be used reliably to enhance significantly the speed with which designs axe optimized for development applications, and (2) to further our ability to describe the linear and nonlinear processes that occur - and can be exploited - in real photonic devices. Experimental integrated optics has been around for over a decade with much of the work during this period. centered on proof-of-principle devices that could be described using simple analytic and numerical models. Recent advances in material growths, photolithography, and device complexity have conspired to reduce significantly the number of devices that can be designed with simple models and to increase dramatically the interest in CIP. In the area of device design, CIP is viewed as critical to understanding device behavior and to optimization. In the area of propagation physics, CIP is an important tool in the study of nonlinear processes in integrated optical devices and fibers. In this talk I will discuss two of the new directions we have been investigating in CIP: Lanczos recursion and finite-difference time-domain.

Hawkins, R.J.; McLeod, R.R.; Kallman, J.S.; Ratowsky, R.P.; Feit, M.D.; Fleck, J.A. Jr.

1992-06-01T23:59:59.000Z

44

SIMULATION AND MOCKUP OF SNS JET-FLOW TARGET WITH WALL JET FOR CAVITATION DAMAGE MITIGATION  

SciTech Connect (OSTI)

Pressure waves created in liquid mercury pulsed spallation targets at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory induce cavitation damage on the stainless steel target container. The cavitation damage is thought to limit the lifetime of the target for power levels at and above 1 MW. Severe through-wall cavitation damage on an internal wall near the beam entrance window has been observed in spent-targets. Surprisingly though, there is very little damage on the walls that bound an annular mercury channel that wraps around the front and outside of the target. The mercury flow through this channel is characterized by smooth, attached streamlines. One theory to explain this lack of damage is that the uni-directional flow biases the direction of the collapsing cavitation bubble, reducing the impact pressure and subsequent damage. The theory has been reinforced by in-beam separate effects data. For this reason, a second-generation SNS mercury target has been designed with an internal wall jet configuration intended to protect the concave wall where damage has been observed. The wall jet mimics the annular flow channel streamlines, but since the jet is bounded on only one side, the momentum is gradually diffused by the bulk flow interactions as it progresses around the cicular path of the target nose. Numerical simulations of the flow through this jet-flow target have been completed, and a water loop has been assembled with a transparent test target in order to visualize and measure the flow field. This paper presents the wall jet simulation results, as well as early experimental data from the test loop.

Wendel, Mark W [ORNL; Geoghegan, Patrick J [ORNL; Felde, David K [ORNL

2014-01-01T23:59:59.000Z

45

Direct Simulation of Magnetic Resonance Relaxation Rates and Line Shapes from Molecular Trajectories  

Science Journals Connector (OSTI)

The Sydney Opera House (SOPHE) method(54) for simulating randomly oriented powder spectra is used to set the initial angles for the N trajectories included in the simulations. ... A new method for simulating randomly oriented powder spectra in magnetic resonance: the Sydney Opera House (SOPHE) method ... A new method named the Sydney Opera House (SOPHE) method for computer reconstruction of randomly oriented powder spectra in magnetic resonance is presented. ...

David P. Rangel; Philippe C. Baveye; Bruce H. Robinson

2012-04-27T23:59:59.000Z

46

Development of a Two-Fluid Drag Law for Clustered Particles Using Direct Numerical Simulation and Validation through Experiments  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Two-Fluid Drag Law Two-Fluid Drag Law for Clustered Particles Using Direct Numerical Simulation and Validation through Experiments Background The Historically Black Colleges and Universities and Other Minority Institutions (HBCU/ OMI) Research and Development (R&D) Program within the U. S. Department of Energy (DOE) Office of Fossil Energy (FE) provides a mechanism for cooperative FE R&D projects between DOE and the HBCU/OMI community. This program encourages

47

Low frequency, electrodynamic simulation of kinetic plasmas with the DArwin Direct Implicit Particle-In-Cell (DADIPIC) method  

SciTech Connect (OSTI)

This dissertation describes a new algorithm for simulating low frequency, kinetic phenomena in plasmas. DArwin Direct Implicit Particle-in-Cell (DADIPIC), as its name implies, is a combination of the Darwin and direct implicit methods. One of the difficulties in simulating plasmas lies in the enormous disparity between the fundamental scale lengths of a plasma and the scale lengths of the phenomena of interest. The objective is to create models which can ignore the fundamental constraints without eliminating relevant plasma properties. Over the past twenty years several PIC methods have been investigated for overcoming the constraints on explicit electrodynamic PIC. These models eliminate selected high frequency plasma phenomena while retaining kinetic phenomena at low frequency. This dissertation shows that the combination of Darwin and Direct Implicit allows them to operate better than they have been shown to operate in the past. Through the Darwin method the hyperbolic Maxwell`s equations are reformulated into a set of elliptic equations. Propagating light waves do not exist in the formulation so the Courant constraint on the time step is eliminated. The Direct Implicit method is applied only to the electrostatic field with the result that electrostatic plasma oscillations do not have to be resolved for stability. With the elimination of these constraints spatial and temporal discretization can be much larger than that possible with explicit, electrodynamic PIC. The code functions in a two dimensional Cartesian region and has been implemented with all components of the particle velocities, the E-field, and the B-field. Internal structures, conductors or dielectrics, may be placed in the simulation region, can be set at desired potentials, and driven with specified currents.

Gibbons, M.R.

1995-06-01T23:59:59.000Z

48

DIRECT NUMERICAL SIMULATIONS OF REFLECTION-DRIVEN, REDUCED MAGNETOHYDRODYNAMIC TURBULENCE FROM THE SUN TO THE ALFVN CRITICAL POINT  

SciTech Connect (OSTI)

We present direct numerical simulations of inhomogeneous reduced magnetohydrodynamic (RMHD) turbulence between the Sun and the Alfvn critical point. These are the first such simulations that take into account the solar-wind outflow velocity and the radial inhomogeneity of the background solar wind without approximating the nonlinear terms in the governing equations. RMHD turbulence is driven by outward-propagating Alfvn waves (z {sup +} fluctuations) launched from the Sun, which undergo partial non-WKB reflection to produce sunward-propagating Alfvn waves (z {sup } fluctuations). We present 10 simulations with different values of the correlation time ?{sub c{sub sun}{sup +}} and perpendicular correlation length L{sub ?} of outward-propagating Alfvn waves at the coronal base. We find that between 15% and 33% of the z {sup +} energy launched into the corona dissipates between the coronal base and Alfvn critical point. Between 33% and 40% of this input energy goes into work on the solar-wind outflow, and between 22% and 36% escapes as z {sup +} fluctuations through the simulation boundary at r = r{sub A}. The z {sup } power spectra scale like k{sub perpendicular}{sup -?{sup }}, where k is the wavenumber in the plane perpendicular to B{sub 0}. In our simulation with the smallest value of ?{sub c{sub sun}{sup +}} (?2 minutes) and largest value of L{sub ?} (2 10{sup 4} km), we find that ?{sup +} decreases approximately linearly with increasing ln (r), reaching a value of 1.3 at r = 11.1 R{sub ?}. Our simulations with larger values of ?{sub c{sub sun}{sup +}} exhibit alignment between the contours of constant ?{sup +}, ?{sup }, ?{sub 0}{sup +}, and ?{sub 0}{sup -}, where ?{sup } are the Elssser potentials and ?{sub 0}{sup } are the outer-scale parallel Elssser vorticities.

Perez, Jean Carlos; Chandran, Benjamin D. G. [Space Science Center, University of New Hampshire, Durham, NH 03824 (United States)

2013-10-20T23:59:59.000Z

49

Coalescence kinetics in surfactant stabilized emulsions: Evolution equations from direct numerical simulations  

SciTech Connect (OSTI)

Lattice Boltzmann simulations were used to study the coalescence kinetics in emulsions with amphiphilic surfactant, under neutrally buoyant conditions, and with a significant kinematic viscosity contrast between the phases (emulating water in oil emulsions). The 3D simulation domain was large enough (256 3rd power -- 10 7th power grid points) to obtain good statistics with droplet numbers ranging from a few thousand at early times to a few hundred near equilibrium. Increased surfactant contents slowed down the coalescence rate between droplets due to the Gibbs-Marangoni effect, and the coalescence was driven by a quasi-turbulent velocity field. The kinetic energy decayed at a relatively slow rate at early times, due to conversion of interfacial energy to kinetic energy in the flow during coalescence. Phenomenological, coupled differential equations for the mean droplet diameter D(t) and the number density nd(t) were obtained from the simulation data and from film draining theories. Local (in time) power law exponents for the growth of the mean diameter (and for the concomitant decrease of nd) were established in terms of the instantaneous values of the kinetic energy, coalescence probability, Gibbs elasticity, and interfacial area. The model studies indicated that true power laws for the growth of the droplet size and decrease of the number of droplets with time may not be justified, since the exponents derived using the phenomenological model were time dependent. In contrast to earlier simulation results for symmetric blends with surfactant, we found no evidence for stretched logarithmic scaling of the formD -- [ln (ct)]a for the morphology length, or exponential scalings associated with arrested growth, on the basis of the phenomenological model.

R. Skartlien; E. Sollum; A. Akselsen; P. Meakin; B. Grimes; J. Sjoblom

2012-12-01T23:59:59.000Z

50

Statistical and Directable Methods for Large-Scale Rigid Body Simulation  

E-Print Network [OSTI]

. . . . . . . . 56 4.2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 4.2.2 The Behavior Preference of Objects . . . . . . . . . . . . . . . 57 4.2.3 Dispatch Collision Pairs . . . . . . . . . . . . . . . . . . . . . 59 4.3 Add Simulation....1 The dispatch strategies for three LODs in our system. We implement three di erent methods for solving the narrow-phase collision detection and response. By managing the dispatch strategies, we can adjust the quality over performance rates in di erent LODs...

Hsu, Shu-Wei

2013-05-07T23:59:59.000Z

51

Numerical simulation of thin-shell direct drive DHe3-filled capsules fielded at OMEGA  

SciTech Connect (OSTI)

Thin-shell deuterium-helium-3 (DHe{sup 3}) filled glass capsules on the Omega laser provide a fast-implosion experimental platform for developing separate time-resolved measurements of ion, electron, and radiation temperatures in nonequilibrium plasmas. Dynamically significant non-local thermodynamic equilibrium (NLTE) conditions are created by the addition of xenon dopant to the DHe{sup 3} gas fill, in quantities sufficient to have an impact on yields, compression, and cooling rates. The high-Z dopant dramatically increases the radiative cooling rate in the plasma, allowing it to collapse in compressions that can be an order of magnitude higher than in undoped capsules. A baseline LASNEX simulation model using detailed configuration accounting NLTE atomic physics shows very good agreement with the data for doped as well as undoped capsules, while other models either underpredict or overpredict the radiative cooling enhancement. The baseline model captures the behavior of the capsule when the D:He{sup 3} ratio is varied well away from equimolar, suggesting no yield anomaly with either nearly pure deuterium or He{sup 3} fills. Variation of the electron-ion coupling in the baseline simulation model shows agreement with the data for a coupling multiplier that is within 20% of unity. Reliably inferring electron-ion coupling strength from the data is complicated by uncertainties in the hydrodynamic mix and other parameters, but many of these can be mitigated in follow-on experiments at the National Ignition Facility.

Miles, A. R.; Chung, H.-K.; Heeter, R.; Hsing, W.; Koch, J. A.; Park, H.-S.; Robey, H. F.; Scott, H. A.; Tommasini, R. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Frenje, J.; Li, C. K.; Petrasso, R. [Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Glebov, V. [Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States); Lee, R. W. [SLAC Linear Coherent Light Source, Menlo Park, California 94025 (United States)

2012-07-15T23:59:59.000Z

52

Direct numerical simulation of electrokinetic instability and transition to chaotic motion  

SciTech Connect (OSTI)

A new type of instabilityelectrokinetic instabilityand an unusual transition to chaotic motion near a charge-selective surface (semiselective electric membrane, electrode, or system of micro-/nanochannels) was studied by the numerical integration of the Nernst-Planck-Poisson-Stokes system and a weakly nonlinear analysis near the threshold of instability. A special finite-difference method was used for the space discretization along with a semi-implicit 31/3 -step Runge-Kutta scheme for the integration in time. Two kinds of initial conditions were considered: (a) white-noise initial conditions to mimic room disturbances and subsequent natural evolution of the solution, and (b) an artificial monochromatic ion distribution with a fixed wave number to simulate regular wave patterns. The results were studied from the viewpoint of hydrodynamic stability and bifurcation theory. The threshold of electroconvective movement was found by the linear spectral stability theory, the results of which were confirmed by numerical simulation of the entire system. Our weakly nonlinear analysis and numerical integration of the entire system predict possibility of both kinds of bifurcations at the critical point, supercritical and subcritical, depending on the system parameters. The following regimes, which replace each other as the potential drop between the selective surfaces increases, were obtained: one-dimensional steady solution, two-dimensional steady electroconvective vortices (stationary point in a proper phase space), unsteady vortices aperiodically changing their parameters (homoclinic contour), periodic motion (limit cycle), and chaotic motion. The transition to chaotic motion does not include Hopf bifurcation. The numerical resolution of the thin concentration polarization layer showed spike-like charge profiles along the surface, which could be, depending on the regime, either steady or aperiodically coalescent. The numerical investigation confirmed the experimentally observed absence of regular (near-sinusoidal) oscillations for the overlimiting regimes. There is a qualitative agreement of the experimental and the theoretical values of the threshold of instability, the dominant size of the observed coherent structures, and the experimental and theoretical voltcurrent characteristics.

Demekhin, E. A., E-mail: edemekhi@gmail.com [Laboratory of Micro- and Nanofluidics, Moscow State University, Moscow 119192 (Russian Federation); Department of Computation Mathematics and Computer Science, Kuban State University, Krasnodar 350040 (Russian Federation); Institute of Mechanics, Moscow State University, Moscow 117192 (Russian Federation); Nikitin, N. V. [Institute of Mechanics, Moscow State University, Moscow 117192 (Russian Federation)] [Institute of Mechanics, Moscow State University, Moscow 117192 (Russian Federation); Shelistov, V. S. [Institute of Mechanics, Moscow State University, Moscow 117192 (Russian Federation) [Institute of Mechanics, Moscow State University, Moscow 117192 (Russian Federation); Scientific Research Department, Kuban State University, Krasnodar 350040 (Russian Federation)

2013-12-15T23:59:59.000Z

53

Direct Simulations of Wind-Driven Breaking Ocean Waves with Data Assimilation  

E-Print Network [OSTI]

A formulation is developed to assimilate ocean-wave data into the Numerical Flow Analysis (NFA) code. NFA is a Cartesian-based implicit Large-Eddy Simulation (LES) code with Volume of Fluid (VOF) interface capturing. The sequential assimilation of data into NFA permits detailed analysis of ocean-wave physics with higher bandwidths than is possible using either other formulations, such as High-Order Spectral (HOS) methods, or field measurements. A framework is provided for assimilating the wavy and vortical portions of the flow. Nudging is used to assimilate wave data at low wavenumbers, and the wave data at high wavenumbers form naturally through nonlinear interactions, wave breaking, and wind forcing. Similarly, the vertical profiles of the mean vortical flow in the wind and the wind drift are nudged, and the turbulent fluctuations are allowed to form naturally. As a demonstration, the results of a HOS of a JONSWAP wave spectrum are assimilated to study short-crested seas in equilibrium with the wind. Log pr...

Dommermuth, Douglas G; Tran, Vu H; Valenciano, Miguel A

2014-01-01T23:59:59.000Z

54

Reconnection in orthogonally interacting vortex tubes: Direct numerical simulations and quantifications  

Science Journals Connector (OSTI)

The three?dimensional time evolution of two orthogonally offset cylindrical vortices of equal strength is simulated by solving the hyperviscosity?regularized incompressible NavierStokes equations. A Fourier pseudospectral method with a time?split integration scheme is used for the solution. Four runs with different Reynolds numbers ranging between 6902100 are performed each with a resolution of 963 collocation points. The sequence of important physical processes and the evolution of local and global quantities such as vorticity velocity and mean?square strain rate are presented. It is found that the growth rate of the maximum vorticity is at most exponential. The Reynolds number dependence of the time scale of reconnection the vorticity growth rate and the time at which the maximum vorticity is attained are examined and differences between the present results and Saffmans essentially two?dimensional model predictions are encountered and elucidated. The distributions of the eigenvalues ? ? ? and the corresponding eigenvectors s ? s ? s ? of the rate of strain tensor S i j are calculated at different times. It is found that as the mean?square strain rate ? increases during the evolution s ? and the vorticity vector ? are perfectly aligned and ?>0 in high ? regions. Strong temporal spatial and Reynolds number dependence of the strain fields is also seen. Evidence is presented that during reconnection the vorticity growth in newly forming bridges takes place in the vicinity of the upper stagnation line segment of the vortex dipole due to the nature of the vortex stretching term. Also examined is the initial finger formation and it is found that the initial nonuniform axial stretching and the displacement of the vortex cores due to a lift force play an important role in this process.

O. N. Boratav; R. B. Pelz; N. J. Zabusky

1992-01-01T23:59:59.000Z

55

Interpretation of time-of-flight distributions for neutral particles under pulsed laser evaporation using direct Monte Carlo simulation  

SciTech Connect (OSTI)

A theoretical study of the time-of-flight (TOF) distributions under pulsed laser evaporation in vacuum has been performed. A database of TOF distributions has been calculated by the direct simulation Monte Carlo (DSMC) method. It is shown that describing experimental TOF signals through the use of the calculated TOF database combined with a simple analysis of evaporation allows determining the irradiated surface temperature and the rate of evaporation. Analysis of experimental TOF distributions under laser ablation of niobium, copper, and graphite has been performed, with the evaluated surface temperature being well agreed with results of the thermal model calculations. General empirical dependences are proposed, which allow indentifying the regime of the laser induced thermal ablation from the TOF distributions for neutral particles without invoking the DSMC-calculated database.

Morozov, Alexey A., E-mail: morozov@itp.nsc.ru [Institute of Thermophysics SB RAS, 1 Lavrentyev Ave., 630090 Novosibirsk (Russian Federation)

2013-12-21T23:59:59.000Z

56

Ultrafast and quantitative X-tomography and simulation of hollow-cone gasoline direct-injection sprays.  

SciTech Connect (OSTI)

Gasoline direct injection (GDI) has the potential to greatly improve internal combustion engine performance through precise control of the injection rate, timing, and combustion of the fuel. A thorough characterization of the hydrodynamics of fuel injection has to come from a precise, quantitative analysis of the sprays, especially in the near-nozzle region. A lack of knowledge of the fuel-spray dynamics has severely limited computational modeling of the sprays and design of improved injection systems. Previously, the structure and dynamics of highly transient fuel sprays have never been visualized or reconstructed in three dimensions (3D) due to numerous technical difficulties. By using an ultrafast x-ray detector and intense monochromatic x-ray beams from synchrotron radiation, the fine structures and dynamics of 1-ms GDI fuel sprays from an outwardly opening nozzle were elucidated by a newly developed, ultrafast, microsecond computed microtomography (CT) technique. In a time-resolved manner, many detailed features associated with the transient fuel flows are readily observable in the quantitatively reconstructed 3D fuel spray density distribution as a result of the quantitative CT technique. More importantly, a computational fluid dynamics (CFD) simulation based on the Taylor analogy breakup (TAB) model has also been performed using the boundary and initial conditions obtained from the experiment data. The experimental and numerical results are in good agreement quantitatively. These results not only reveal the characteristics of the GDI fuel sprays with unprecedented detail, but will also facilitate realistic computational fluid dynamic simulations in highly transient, multiphase systems.

Liu, X.; Im, K-S; Wang, Y.; Wang, J.; Tate, M.W.; Ercan, A.; Schuette, D.R.; Gruner, S.M. (X-Ray Science Division); (Cornell Univ.)

2007-01-01T23:59:59.000Z

57

Direct numerical simulation of ignition front propagation in a constant volume with temperature inhomogeneities. I. Fundamental analysis and diagnostics  

SciTech Connect (OSTI)

The influence of thermal stratification on autoignition at constant volume and high pressure is studied by direct numerical simulation (DNS) with detailed hydrogen/air chemistry with a view to providing better understanding and modeling of combustion processes in homogeneous charge compression-ignition engines. Numerical diagnostics are developed to analyze the mode of combustion and the dependence of overall ignition progress on initial mixture conditions. The roles of dissipation of heat and mass are divided conceptually into transport within ignition fronts and passive scalar dissipation, which modifies the statistics of the preignition temperature field. Transport within ignition fronts is analyzed by monitoring the propagation speed of ignition fronts using the displacement speed of a scalar that tracks the location of maximum heat release rate. The prevalence of deflagrative versus spontaneous ignition front propagation is found to depend on the local temperature gradient, and may be identified by the ratio of the instantaneous front speed to the laminar deflagration speed. The significance of passive scalar mixing is examined using a mixing timescale based on enthalpy fluctuations. Finally, the predictions of the multizone modeling strategy are compared with the DNS, and the results are explained using the diagnostics developed. (author)

Chen, Jacqueline H.; Hawkes, Evatt R.; Sankaran, Ramanan [Reacting Flow Research Department, Combustion Research Facility, Sandia National Laboratories, P.O. Box 969 MS 9051, Livermore, CA 94551-0969 (United States); Mason, Scott D. [Lockheed Martin Corporation, Sunnyvale, CA 94089 (United States); Im, Hong G. [Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2125 (United States)

2006-04-15T23:59:59.000Z

58

Modlisation et simulation d'un champ d'hliostats rflchissant le rayonnement solaire direct vers une cible fixe  

E-Print Network [OSTI]

heliostats. For each single heliostat, flux density calculations are performed through a direct integration

Paris-Sud XI, Université de

59

MODELING STATISTICAL PROPERTIES OF SOLAR ACTIVE REGIONS THROUGH DIRECT NUMERICAL SIMULATIONS OF 3D-MHD TURBULENCE  

SciTech Connect (OSTI)

Statistical properties of the Sun's photospheric turbulent magnetic field, especially those of the active regions (ARs), have been studied using the line-of-sight data from magnetograms taken by the Solar and Heliospheric Observatory and several other instruments. This includes structure functions and their exponents, flatness curves, and correlation functions. In these works, the dependence of structure function exponents ({zeta}{sub p}) of the order of the structure functions (p) was modeled using a non-intermittent K41 model. It is now well known that the ARs are highly turbulent and are associated with strong intermittent events. In this paper, we compare some of the observations from Abramenko et al. with the log-Poisson model used for modeling intermittent MHD turbulent flows. Next, we analyze the structure function data obtained from the direct numerical simulations (DNS) of homogeneous, incompressible 3D-MHD turbulence in three cases: sustained by forcing, freely decaying, and a flow initially driven and later allowed to decay (case 3). The respective DNS replicate the properties seen in the plots of {zeta}{sub p} against p of ARs. We also reproduce the trends and changes observed in intermittency in flatness and correlation functions of ARs. It is suggested from this analysis that an AR in the onset phase of a flare can be treated as a forced 3D-MHD turbulent system in its simplest form and that the flaring stage is representative of decaying 3D-MHD turbulence. It is also inferred that significant changes in intermittency from the initial onset phase of a flare to its final peak flaring phase are related to the time taken by the system to reach the initial onset phase.

Malapaka, Shiva Kumar; Mueller, Wolf-Christian [Max-Planck Institute for Plasma Physics, Boltzmannstrasse 2, D-85748 Garching bei Muenchen (Germany)

2013-09-01T23:59:59.000Z

60

Energy Savings in Direct Evaporative Cooling: real application in the Madrid metro and simulated application for offices in Sydney  

E-Print Network [OSTI]

Water evaporates spontaneously in contact with the air, absorbing around 680 W/(kg/h of evaporated water) from the air (1,053 BTU/lb.). Direct Evaporative Cooling (DEC) exploits this simple physical phenomenon to achieve high cooling capacities...

Simonetti, R.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Modelling, simulation and analysis of low-cost direct torque control of PMSM using hall-effect sensors  

E-Print Network [OSTI]

is presented. A mathematical model for the proposed DTC of the PMSM topology is developed. A simulation program written in MATLAB/SIMULINK? is used to verify the basic operation (performance) of the proposed topology. The mathematical model is capable....5 Load Angle Measurement ........................................................................81 ix CHAPTER IV OPEN-LOOP SIMULINK? MODEL OF THE PM SPINDLE MOTOR ...........88 4.1 Principles of PMSM Open-Loop Control...

Ozturk, Salih Baris

2007-04-25T23:59:59.000Z

62

Direct dynamics simulation of dioxetane formation and decomposition via the singlet OOCH2CH2 biradical: Non-RRKM dynamics  

SciTech Connect (OSTI)

Electronic structure calculations and direct chemical dynamics simulations are used to study the formation and decomposition of dioxetane on its ground state singlet potential energy surface. The stationary points for 1O2 + C2H4, the singlet {center_dot}O-O-CH2-CH2{center_dot} biradical, the transition state (TS) connecting this biradical with dioxetane, and the two transition states and gauche {center_dot}O-CH2-CH2-O{center_dot} biradical connecting dioxetane with the formaldehyde product molecules are investigated at different levels of electronic structure theory including UB3LYP, UMP2, MRMP2, and CASSCF and a range of basis sets. The UB3LYP/6-31G* method was found to give representative energies for the reactive system and was used as a model for the simulations. UB3LYP/6-31G* direct dynamics trajectories were initiated at the TS connecting the {center_dot}O-O-CH2-CH2{center_dot} biradical and dioxetane by sampling the TS's vibrational energy levels, and rotational and reaction coordinate energies, with Boltzmann distributions at 300, 1000, and 1500 K. This corresponds to the transition state theory model for trajectories that pass the TS. The trajectories were directed randomly towards both the biradical and dioxetane. A small fraction of the trajectories directed towards the biradical recrossed the TS and formed dioxetane. The remainder formed 1O2 + C2H4 and of these {approx} 40% went directly from the TS to 1O2 + C2H4 without getting trapped and forming an intermediate in the {center_dot}O-O- CH2-CH2{center_dot} biradical potential energy minimum, a non-statistical result. The dioxetane molecules which are formed dissociate to two formaldehyde molecules with a rate constant two orders of magnitude smaller than that predicted by Rice-Ramsperger-Kassel-Marcus theory. The reaction dynamics from dioxetane to the formaldehyde molecules do not follow the intrinsic reaction coordinate or involve trapping in the gauche {center_dot}O-CH2-CH2-O{center_dot} biradical potential energy minimum. Important non-statistical dynamics are exhibited for this reactive system.

Sun, Rui; Park, Kyoyeon; De Jong, Wibe A.; Lischka, Hans; Windus, Theresa L.; Hase, William L.

2012-07-28T23:59:59.000Z

63

Study of mixture formation and early flame development in a research GDI (gasoline direct injection) engine through numerical simulation and UV-digital imaging  

Science Journals Connector (OSTI)

Abstract The analysis of the mixture formation and early combustion processes in a slightly lean burn gasoline direct injection (GDI) engine is performed by using experimental and numerical techniques. UVvisible natural emission digital imaging is applied in the optically accessible combustion chamber of a research engine. This is equipped with the four-valve head and the same injection system of a commercial turbocharged engine. Optical accessibility is obtained through a quartz window placed on the piston head. Numerical simulations are performed by means of a 3D model developed within the AVL FireTM environment, which exploits an in-house developed sub-model for simulating the spray dynamics. Tests are carried out using commercial gasoline. The cyclic variability of the engine is first analysed in order to properly define a reference average pressure cycle to be used for the validation of the numerical model. This last is then proved as being highly predictive as the start of injection is moved in the working cycle. The main effects of the injection and ignition timing on the characteristic flame development angles, namely on the flame initiation and propagation, are analysed. Flame initiation is visualised both numerically and experimentally.

M. Costa; L. Marchitto; S.S. Merola; U. Sorge

2014-01-01T23:59:59.000Z

64

3-D particle-in-cell simulations for quasi-phase matched direct laser electron acceleration in density-modulated plasma waveguides  

E-Print Network [OSTI]

Quasi-phase matched direct laser acceleration (DLA) of electrons can be realized with guided, radially polarized laser pulses in density-modulated plasma waveguides. A 3-D particle-in-cell model has been developed to describe the interactions among the laser field, injected electrons, and the background plasma in the DLA process. Simulations have been conducted to study the scheme in which seed electron bunches with moderate energies are injected into a plasma waveguide and the DLA is performed by use of relatively low-power (0.5-2 TW) laser pulses. Selected bunch injection delays with respect to the laser pulse, bunch lengths, and bunch transverse sizes have been studied in a series of simulations of DLA in a plasma waveguide. The results show that the injection delay is important for controlling the final transverse properties of short electron bunches, but it also affects the final energy gain. With a long injected bunch length, the enhanced ion-focusing force helps to collimate the electrons and a relativ...

Lin, M -W; Chen, S -H; Jovanovic, I

2014-01-01T23:59:59.000Z

65

CIS 262 Fall 2013: Solutions to Homework 6 One direction is easy; Left Reset Turing machine can obviously be simulated by a regular Turing machine  

E-Print Network [OSTI]

machine can obviously be simulated by a regular Turing machine: Moving the head to right is the same. A regular Turing machine can simulate Reset by moving its head to the left-hand end of the tape denoted by a dotted character. Now we will show that Left Reset machine can simulate regular TM. Again moving the head

Plotkin, Joshua B.

66

Optimum Performance of Direct Hydrogen Hybrid Fuel Cell Vehicles  

E-Print Network [OSTI]

simulation tool for hydrogen fuel cell vehicles, Journal ofeconomies of the direct hydrogen fuel cell vehicle withoutMaximizing Direct-Hydrogen Pem Fuel Cell Vehicle Efficiency-

Zhao, Hengbing; Burke, Andy

2009-01-01T23:59:59.000Z

67

Direct numerical simulation of turbulent mixing  

Science Journals Connector (OSTI)

...in-[5]. The low-cost approach to turbulence...growing with n. The graphs corresponding to these...rates-both chemical and nuclear. The same is true for...Figure-17 shows the graph of the TMZ boundary dependence...of providing safety in nuclear power production facilities...

2013-01-01T23:59:59.000Z

68

Direct numerical simulations of aeolian sand ripples  

Science Journals Connector (OSTI)

...where the shear velocity up is defined by...the average fluid velocity field by a Prandtl-like...around a given x from mass conservation: Z x...the grain upward velocity and the sum is over...to three different wind shear velocities...image, showing the map of the grain volume...

Orencio Durn; Philippe Claudin; Bruno Andreotti

2014-01-01T23:59:59.000Z

69

Direct Numerical Simulation of Cosmological Reionization /  

E-Print Network [OSTI]

2004). We are focusing on EoR which occured after the Dark2004). We are focusing on EoR which occured after the DarkEpoch of Reionization (EoR). In Figure 1.1, a brief history

So, Geoffrey C.

2013-01-01T23:59:59.000Z

70

Direct Simulation of Internal Wave Energy Transfer  

Science Journals Connector (OSTI)

A three-dimensional nonhydrostatic numerical model is used to calculate nonlinear energy transfers within decaying GarrettMunk internal wavefields. Inviscid wave interactions are calculated over horizontal scales from about 1 to 80 km and for ...

Kraig B. Winters; Eric A. DAsaro

1997-09-01T23:59:59.000Z

71

Directives Help  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

All DOE directives are available through this site. While it may seem overwhelming, given the number of documents, we have provided a number of ways in which you may get to the information you need.

72

Direct costing  

E-Print Network [OSTI]

oau 5e reduced. Under the same oonOitions, even ~Me on a bread scale entails not mere1y the conduct of the direct oyeraticns cf yrccessing the materials into finished products, but also the performance of auxiliary functions. these may 'ba power y... purposes have been advanced as folkway le Most of a o03RyaxO' 8 products Grc usual13r sold at prices which oovex' full product costs y plus 861ling a%el administrative expenses, plus normal profit. The inventoi~ valuate. on should be consistent...

Browning, Donald Bullock

2012-06-07T23:59:59.000Z

73

Future Directions for Magnetic Sensors  

E-Print Network [OSTI]

Future Directions for Magnetic Sensors: HYBRIDMATERIALS Our goal is to develop the scientific expertise needed to allow modeling and simulation to become the driving force in improving magnetic sensors effectiveness in developing new and improved magnetic sensors. By quantifying the improvement in sensor

74

Modeling & Simulation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Modeling & Simulation Modeling & Simulation Research into alternative forms of energy, especially energy security, is one of the major national security imperatives of this...

75

A Pragmatic Methodology for Testing Intrusion Prevention Systems  

Science Journals Connector (OSTI)

......traffic initiated within intranets allowing compromised internal...ultimately change the traffic characteristics as additional packets such...operations help shape the characteristics of the replayed traffic...in common the following characteristics: (a) uni-directional-feeding......

Zhongqiang Chen; Alex Delis; Peter Wei

2009-07-01T23:59:59.000Z

76

Robot Paintings Evolved Using Simulated Robots  

Science Journals Connector (OSTI)

We describe our efforts to evolve robot paintings using simulated robots. Our evolutionary framework considers only the initial positions and initial directions of the simulated robots. Our fitness functions d...

Gary Greenfield

2006-01-01T23:59:59.000Z

77

Improved Solvers for Advanced Engine Combustion Simulation  

Broader source: Energy.gov (indexed) [DOE]

Volvo; multi-zone cycle simulation, OpenFOAM model development Bosch; High Performance Computing of HCCISI transition Delphi; direct injection GE Research; new...

78

Modeling and Optimization of PEMFC Systems and its Application to Direct Hydrogen Fuel Cell Vehicles  

E-Print Network [OSTI]

operating conditions. Direct Hydrogen Fuel Cell System Modelconditions for a direct hydrogen fuel cell system Table 1simulation tool for hydrogen fuel cell vehicles, Journal of

Zhao, Hengbing; Burke, Andy

2008-01-01T23:59:59.000Z

79

Numerical simulation of thin-shell direct drive DHe3-filled capsules fielded A. R. Miles, H.-K. Chung, R. Heeter, W. Hsing, J. A. Koch et al.  

E-Print Network [OSTI]

and rebounding in a high-intensity CO2 laser induced air plasma Phys. Plasmas 19, 073302 (2012) Feasibility to the DHe3 gas fill, in quantities sufficient to have an impact on yields, compression, and cooling rates in compressions that can be an order of magnitude higher than in undoped capsules. A baseline LASNEX simulation

80

Simulation Tools  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Building simulation tool screen capture Building simulation tool screen capture Simulation Tools Researchers develop whole-building energy simulation software programs that allow architects and building engineers to design or retrofit buildings for maximum energy efficiency and occupant comfort. Programs developed by researchers include: the EnergyPlus whole building simulation program, the Modelica Buildings library for rapid prototyping and controls design, the Building Controls Virtual Test Bed for co-simulation and for model-based operation, and the GenOpt generic optimization program. Contacts Philip Haves PHaves@lbl.gov (510) 486-6512 Michael Wetter MWetter@lbl.gov (510) 486-6990 Links Simulation Research Group Batteries and Fuel Cells Buildings Energy Efficiency Applications Commercial Buildings

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Distributed Simulation and Simulation Practice  

Science Journals Connector (OSTI)

The possibilities of distributed simulation have been discussed for well over a decade, yet there is only limited evidence of its implementation, particularly within industry. The reasons for this are discussed by identifying the potential applications ... Keywords: Distributed simulation, complexity, innovation, simulation practice

Stewart Robinson

2005-01-01T23:59:59.000Z

82

Modellierung und Simulation der Direktverdampfung in Absorberrohren  

E-Print Network [OSTI]

Modelling and simulation of direct steam generation in the absorber tubes of solar thermal power plants vonModellierung und Simulation der Direktverdampfung in Absorberrohren solarthermischer Kraftwerke Verwendung des WENO Schemas. Zur Simulation wird die numerische L¨osung in einer Software unter C++ umgesetzt

Ábrahám, Erika

83

Quantum Simulation  

E-Print Network [OSTI]

Simulating quantum mechanics is known to be a difficult computational problem, especially when dealing with large systems. However, this difficulty may be overcome by using some controllable quantum system to study another less controllable or accessible quantum system, i.e., quantum simulation. Quantum simulation promises to have applications in the study of many problems in, e.g., condensed-matter physics, high-energy physics, atomic physics, quantum chemistry and cosmology. Quantum simulation could be implemented using quantum computers, but also with simpler, analog devices that would require less control, and therefore, would be easier to construct. A number of quantum systems such as neutral atoms, ions, polar molecules, electrons in semiconductors, superconducting circuits, nuclear spins and photons have been proposed as quantum simulators. This review outlines the main theoretical and experimental aspects of quantum simulation and emphasizes some of the challenges and promises of this fast-growing field.

I. M. Georgescu; S. Ashhab; Franco Nori

2014-03-13T23:59:59.000Z

84

Multiple direction vibration fixture  

DOE Patents [OSTI]

An apparatus for simulating a rocket launch environment on a test item undergoing centrifuge testing by subjecting the item simultaneously or separately to vibration along an axis of centripetal force and along an axis perpendicular to the centripetal force axis. The apparatus includes a shaker motor supported by centrifuge arms and a right angle fixture pivotally connected to one of the shaker motor mounts. When the shaker motor vibrates along the centripetal force axis, the vibrations are imparted to a first side of the right angle fixture. The vibrations are transmitted 90 degrees around the pivot and are directed to a second side of the right angle fixture which imparts vibrations perpendicular to the centripetal force axis. The test item is in contact with a third side of the right angle fixture and receives both centripetal-force-axis vibrations and perpendicular axis vibrations simultaneously. A test item can be attached to the third side near the flexible coupling or near the air bag to obtain vibrations along the centripetal force axis or transverse to the centripetal force axis.

Cericola, Fred (Albuquerque, NM); Doggett, James W. (Albuquerque, NM); Ernest, Terry L. (Albuquerque, NM); Priddy, Tommy G. (Rockville, MD)

1991-01-01T23:59:59.000Z

85

Directives Quarterly Updates  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

Listings of new Justification Memoranda and new or revised Directives that have been posted to the DOE Directives, Delegations, and Requirements Portal. Updated quarterly.

86

Another face of DIRECT  

E-Print Network [OSTI]

authors, see for example, tree-Direct [5]. This paper ..... [4] J.M. Gablonsky, Modifications of the DIRECT Algorithm, Ph.D. Thesis, North Carolina State. University...

chiter

2007-08-01T23:59:59.000Z

87

An Integrated Platform for Engine Performance Simulations and Optimization under Diesel Conditions  

Broader source: Energy.gov [DOE]

The direct injection stochastic reactor model is capable of accurate simulation of combustion under diesel conditions and can also be used to simulate and test different fuels.

88

Foreign Direct Investment  

Gasoline and Diesel Fuel Update (EIA)

Investment Investment Foreign Direct Investment Foreign Direct Investment Foreign Direct Investment in U.S. Energy in U.S. Energy in U.S. Energy in U.S. Energy in 1999 in 1999 in 1999 in 1999 June 2001 ii iii Contents Foreign Affiliates' Role in U.S. Energy Industry Operations ..............................................................................1 Foreign Direct Investment: The International Transactions Accounts ..............................................................8 U.S. Companies' Direct Investment Abroad in Energy ......................................................................................14 Conclusion...............................................................................................................................................................19

89

Presented by High Fidelity Direct Numerical  

E-Print Network [OSTI]

Presented by High Fidelity Direct Numerical Simulations of Turbulent Combustion Jacqueline H. Chen (PI), Chun Sang Yoo, Gaurav Bansal, Hongfeng Yu, Ajith Mascarenhas Combustion Research Facility Sandia) of turbulent combustion DNS approach and role � Fully resolve all continuum scales without using subgrid models

90

On integrating large eddy simulation and laboratory turbulent flow experiments  

Science Journals Connector (OSTI)

...effective simulation strategy mostly by necessity...its analysis and development, further understanding...directed research and development program at Los...multi-swirl gas turbine combustor. Proc...simulation of a gas turbine combustor flow...

2009-01-01T23:59:59.000Z

91

MESOSCALE SIMULATIONS OF POWDER COMPACTION  

SciTech Connect (OSTI)

Mesoscale 3D simulations of shock compaction of metal and ceramic powders have been performed with an Eulerian hydrocode GEODYN. The approach was validated by simulating a well-characterized shock compaction experiment of a porous ductile metal. Simulation results using the Steinberg material model and handbook values for solid 2024 aluminum showed good agreement with experimental compaction curves and wave profiles. Brittle ceramic materials are not as well studied as metals, so a simple material model for solid ceramic (tungsten carbide) has been calibrated to match experimental compaction curves. Direct simulations of gas gun experiments with ceramic powders have been performed and showed good agreement with experimental data. The numerical shock wave profile has same character and thickness as that measured experimentally using VISAR. The numerical results show reshock states above the single-shock Hugoniot line as observed in experiments. We found that for good quantitative agreement with experiments 3D simulations are essential.

Lomov, Ilya; Fujino, Don; Antoun, Tarabay; Liu, Benjamin [Lawrence Livermore National Laboratory, P. O. Box 808, Livermore CA 94551 (United States)

2009-12-28T23:59:59.000Z

92

Direct/Indirect Costs  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

This chapter provides recommended categories for direct and indirect elements developed by the Committee for Cost Methods Development (CCMD) and describes various estimating techniques for direct and indirect costs.

1997-03-28T23:59:59.000Z

93

SATCOM constellation power simulation  

SciTech Connect (OSTI)

Three basic variables directly impact the power and energy generated by the SATCOM satellite constellation and its individual Space Vehicles (SVs). They are (1) telecommunications traffic patterns, (2) network resource management controllables, and (3) system hardware and software performance. This power simulation has verified the robustness of the telecommunications architecture. It has validated the onboard resource allocation process from an SV and network level power and energy perspective. The analyses have led to development of operational procedures that prevent SV node outages, and maximize network telecommunication traffic capacity. The program objective is to optimize overall system operation, availability and quality of service. Achieving this goal requires a thorough understanding of the Electrical Power Subsystem and its interfaces. The EPS simulation model analyzes network level performance by evaluating requirement compliance in the expected operating environments. Specifically, the simulation tool evaluates different design approaches and network operational strategies from a power and energy perspective. As a result, optimal load management solutions will be implemented both on-board the SV and via ground station directed resource allocation strategies.

Capulli, J.; Badke, B.; Davis, G. [Motorola, Chandler, AZ (United States)

1995-12-31T23:59:59.000Z

94

Directives System Manual  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

This Manual provides detailed requirements to supplement DOE O 251.1A, Directives System, dated 1-30-98.

1998-01-30T23:59:59.000Z

95

Cylindrical implosion experiments using laser direct drive  

SciTech Connect (OSTI)

Direct-drive cylindrical-implosion experiments are performed to study perturbed hydrodynamic flows in convergent geometry. Two experimental campaigns have been conducted, to demonstrate the advantages of direct over indirect drive and to validate numerical simulations of zeroth-order hydrodynamics and single-mode perturbation growth. Results and analysis of three unperturbed-target shots and two perturbed-target shots are discussed in detail. For unperturbed-target implosions, positions of inner and outer shell edges agree between simulation and experiment during the laser pulse. However, observed shell thickness is greater than simulated in unperturbed targets during deceleration and rebound; the effect appears only at the shell{close_quote}s exterior edge. For perturbed-target implosions, growth factors {approximately}10{endash}14 are observed, whereas growth factors near 30 are expected from simulation. Rayleigh{endash}Taylor growth appears to differ between simulation and experiment. Observed zeroth-order flow at the exterior edge of imploding, perturbed targets appears to differ from simulation, even during acceleration. A possible physical model to explain such apparent differences is identified. {copyright} {ital 1999 American Institute of Physics.}

Tubbs, D.L.; Barnes, C.W.; Beck, J.B.; Hoffman, N.M.; Oertel, J.A.; Watt, R.G. [Los Alamos National Laboratory, Post Office Box 1663, Los Alamos, New Mexico 87545 (United States)] [Los Alamos National Laboratory, Post Office Box 1663, Los Alamos, New Mexico 87545 (United States); Boehly, T.; Bradley, D.; Jaanimagi, P.; Knauer, J. [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299 (United States)] [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623-1299 (United States)

1999-05-01T23:59:59.000Z

96

Numerical Simulation of Combustion Processes in Homogeneous and Stratified Charge Spark Ignition Engines  

Science Journals Connector (OSTI)

A three-dimensional simulation technique for stratified combustion process in direct injection gasoline engines is developed....

Hiroshi Miyagawa; Yoshihiro Nomura; Makoto Koike

2001-01-01T23:59:59.000Z

97

Enabling immersive simulation.  

SciTech Connect (OSTI)

The object of the 'Enabling Immersive Simulation for Complex Systems Analysis and Training' LDRD has been to research, design, and engineer a capability to develop simulations which (1) provide a rich, immersive interface for participation by real humans (exploiting existing high-performance game-engine technology wherever possible), and (2) can leverage Sandia's substantial investment in high-fidelity physical and cognitive models implemented in the Umbra simulation framework. We report here on these efforts. First, we describe the integration of Sandia's Umbra modular simulation framework with the open-source Delta3D game engine. Next, we report on Umbra's integration with Sandia's Cognitive Foundry, specifically to provide for learning behaviors for 'virtual teammates' directly from observed human behavior. Finally, we describe the integration of Delta3D with the ABL behavior engine, and report on research into establishing the theoretical framework that will be required to make use of tools like ABL to scale up to increasingly rich and realistic virtual characters.

McCoy, Josh (University of California Santa Cruz, Santa Cruz, CA); Mateas, Michael (University of California Santa Cruz, Santa Cruz, CA); Hart, Derek H.; Whetzel, Jonathan; Basilico, Justin Derrick; Glickman, Matthew R.; Abbott, Robert G.

2009-02-01T23:59:59.000Z

98

FASTBUS simulation tools  

SciTech Connect (OSTI)

A generalized model of a FASTBUS master is presented. The model is used with simulation tools to aid in the specification, design, and production of FASTBUS slave modules. The model provides a mechanism to interact with the electrical schematics and software models to predict performance. The model is written in the IEEE std 1076-1987 hardware description language VHDL. A model of the ATC logic is also presented. VHDL was chosen to provide portability to various platforms and simulation tools. The models, in conjunction with most commercially available simulators, will perform all of the transactions specified in IEEE std 960-1989. The models may be used to study the behavior of electrical schematics and other software models and detect violations of the FASTBUS protocol. For example, a hardware design of a slave module could be studied, protocol violations detected and corrected before committing money to prototype development. The master model accepts a stream of high level commands from an ASCII file to initiate FASTBUS transactions. The high level command language is based on the FASTBUS standard routines listed in IEEE std 1177-1989. Using this standard-based command language to direct the model of the master, hardware engineers can simulate FASTBUS transactions in the language used by physicists and programmers to operate FASTBUS systems. 15 refs., 6 figs.

Dean, T.D. (Stanford Linear Accelerator Center, Menlo Park, CA (United States)); Haney, M.J. (Illinois Univ., Urbana, IL (United States))

1991-10-01T23:59:59.000Z

99

Implicit Large Eddy Simulation  

National Nuclear Security Administration (NNSA)

Implicit Implicit Large Eddy Simulation (ILES) for High Reynolds Number Flows Len Margolin Applied Physics Division Los Alamos National Laboratory Collaborators: 1. Bill Rider (LANL) 2. Piotr Smolarkiewicz (NCAR) 3. Andrzej Wysogrodski (NCAR) 4. Fernando Grinstein (NRL) len@lanl.gov 1 Implicit Large Eddy Simulation Outline: * What is ILES? * What are its advantages? * Historical perspective * Why does it work? * Some examples len@lanl.gov 2 What is ILES ILES is the direct application of a fluid solver to a high Reynolds number fluid flow with no explicit turbulence model. · The truncation terms of the algorithm serve as an effective model of the effects of the unresolved scales. · Fluid solvers based on Nonoscillatory Finite Volume (NFV) approximations work effectively for ILES. · Fluid solvers based on pseudospectral methods, leapfrog methods, advective form methods, etc. do not work

100

Two dimensional control of metamaterial parameters for radiation directivity  

E-Print Network [OSTI]

This work examines the feasibility of using metamaterials to direct radiation. The limits of required index of refraction and the required material depth are explored using MATLAB simulations. A wedge of connected S-shape ...

Foltz, Eleanor R. (Eleanor Ruth)

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

SAFL Channel | Open Energy Information  

Open Energy Info (EERE)

SAFL Channel SAFL Channel Jump to: navigation, search Basic Specifications Facility Name SAFL Channel Overseeing Organization University of Minnesota Hydrodynamics Hydrodynamic Testing Facility Type Channel Length(m) 84.0 Beam(m) 2.8 Depth(m) 1.8 Cost(per day) Contact POC Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 6.1 Length of Effective Tow(m) 76.0 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.4 Maximum Wave Length(m) 6.6 Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking No Wavemaking Description Programmable control of wave making is currently in development and will be available in fall of 2009. Wave Direction Uni-Directional Simulated Beach Yes Description of Beach Channel is sufficiently adaptable to allow simulation of beach

102

Maine Tow Tank | Open Energy Information  

Open Energy Info (EERE)

Tow Tank Tow Tank Jump to: navigation, search Basic Specifications Facility Name Maine Tow Tank Overseeing Organization University of Maine Hydrodynamics Hydrodynamic Testing Facility Type Tow Tank Length(m) 30.5 Beam(m) 2.4 Depth(m) 1.2 Cost(per day) Contact POC Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 3 Length of Effective Tow(m) 27.4 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.0 Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wave Direction Uni-Directional Simulated Beach Yes Description of Beach Simulated beach is framed with PVC/mesh. Has a 4:9 slope. Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None Control and Data Acquisition

103

Departmental Directives Program  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

To define requirements and responsibilities for implementing the Department of Energy (DOE) Directives Program in support of the Secretary's memorandum of September 10, 2007, Principles Governing Departmental Directives. See also the current list of Directives Requiring Further Documentation, as required by Appendix D of this Order. Cancels DOE P 251.1A, DOE O 251.1B, DOE M 251.1-1B.

2007-09-10T23:59:59.000Z

104

Directives System Manual  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

This Manual provides detailed requirements to supplement DOE O 251.1, which establishes requirements for the development, coordination, and sunset review of DOE directives.

1995-10-16T23:59:59.000Z

105

Departmental Directives Program  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

To establish directives as the primary means to set, communicate, and institutionalize policies, requirements, responsibilities, and procedures for Departmental elements and contractors.

2014-10-16T23:59:59.000Z

106

Direct Simulation of Argon Rectification in Single Bubble Sonoluminescence  

E-Print Network [OSTI]

collapse when the bubble is hot. The gases will react with water vapor to form soluble species, which into the liquid. The flux of stable dissolved gas species from the liquid (such as argon, nitrogen, hydrogen, there is still an incomplete quantitative prediction of the phenomena. Recently, the importance of water vapor

Storey, Brian D.

107

Direct Numerical Simulation of the Flow in a Pebble Bed  

E-Print Network [OSTI]

,lelt),uvdyms(lx1,ly1,lz1,lelt), $ uvdzms(lx1,ly1,lz1,lelt),uwdxms(lx1,ly1,lz1,lelt), $ uwdyms(lx1,ly1,lz1,lelt),uwdzms(lx1,ly1,lz1,lelt), $ vwdxms(lx1,ly1,lz1,lelt),vwdyms(lx1,ly1,lz1,lelt), $ vwdzms(lx1,ly1,lz1,lelt),eps_uu(lx1...,ly1,lz1,lelt), $ eps_vv(lx1,ly1,lz1,lelt),eps_ww(lx1,ly1,lz1,lelt), $ eps_uv(lx1,ly1,lz1,lelt),eps_uw(lx1,ly1,lz1,lelt), $ eps_vw(lx1,ly1,lz1,lelt) common /production/ $ prd_uu(lx1,ly1,lz1,lelt),prd_vv(lx1,ly1,lz1,lelt...

Ward, Paul

2014-06-24T23:59:59.000Z

108

Direct Numerical Simulation of Polymer Electrolyte Fuel Cell Catalyst  

E-Print Network [OSTI]

. Mukherjee,1 Guoqing Wang,2 and Chao-Yang Wang1 * 1 Electrochemical Engine Center (ECEC), and Department efficiency, zero pollution and low noise, are widely considered as the 21st century energy- conversion humidified air is fed into the cathode. Hydrogen and oxygen combine electrochemically within the active

109

Towards adaptive and directable control of simulated creatures  

E-Print Network [OSTI]

Interactive animation is used ubiquitously for entertainment and for the communication of ideas. Active creatures, such as humans, robots, and animals, are often at the heart of such animation and are required to interact ...

Abe, Yeuhi

2007-01-01T23:59:59.000Z

110

Direct Numerical Simulations of Plunging Airfoils Yves Allaneau  

E-Print Network [OSTI]

Energy H Specific Total Enthalpy k Specific Kinetic Energy Dynamic Viscosity Volume Viscosity) scheme, the global balance of kinetic energy over the computational domain, along with the balance of mass, momentum and total energy is respected. The KEP scheme provides improved stability, removing

Jameson, Antony

111

Ripping Graphene: Preferred Directions  

Science Journals Connector (OSTI)

Ripping Graphene: Preferred Directions ... Here we present experimental and theoretical studies on cracks or tears in suspended monolayer graphene membranes. ... Edges from mechanically induced ripping exhibit straight lines and are predominantly aligned in the armchair or zigzag directions of the graphene lattice. ...

Kwanpyo Kim; Vasilii I. Artyukhov; William Regan; Yuanyue Liu; M. F. Crommie; Boris I. Yakobson; A. Zettl

2011-12-12T23:59:59.000Z

112

Departmental Directives System  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

The order establishes the directives system to be used for publishing permanent and temporary directives issued by DOE Headquarters and addressed to Headquarters and/or field elements. Chg 1 dated 3-14-85. Cancels DOE 1321.1A.

1983-04-07T23:59:59.000Z

113

Directional Flooding Scheme with Data Aggregation for Energy-Efficient Wireless Sensor Networks  

Science Journals Connector (OSTI)

We propose a directional flooding with data aggregation (DFDA) using hop- ... savings by reducing the redundant transmissions using directional flooding based on hop-count and data aggregation. Our simulation res...

Sung-Hyup Lee; Kang-Won Lee; You-Ze Cho

2008-01-01T23:59:59.000Z

114

direct_deposit_111609  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PROTECT YOUR BANKING INFORMATION: PROTECT YOUR BANKING INFORMATION: DO NOT complete this form until you are ready to submit it to the Payroll Department. DIRECT DEPOSIT REQUEST Directions: 1. Provide required information neatly, legibly; 2. If Checking Account Direct Deposit, include a voided check. a. DO NOT submit a deposit slip! 3. If Savings Account Direct Deposit, include a copy of savings card. 4. Sign this form; 5. Inter-office mail it to Craft Payroll at "P238." DIRECT DEPOSITION AUTHORIZATION I hereby authorize Los Alamos National Laboratory, hereinafter called The Laboratory, to initiate credit entries and, if necessary, debit entries and adjustments for any credit entries in error to my account listed on this form. If deposit is for:

115

Directions and Maps  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Directions & Maps Directions & Maps Plan Your Visit Visit About the Museum Museum Hours Directions & Maps When to Visit Arrange for a Visit Around Los Alamos Contact Us invisible utility element Directions and Maps Aerial View of Los Alamos Aerial approach to the Los Alamos airport Where we're located Los Alamos (elevation 7,355 feet) is perched high atop the Pajarito Plateau in the Jemez Mountains, 35 miles northwest of Santa Fe. The Bradbury Science Museum is located in downtown Los Alamos at the corner of Central Avenue and 15th Street. If you're driving here and using GPS navigation, our address is 1350 Central Avenue, Los Alamos, NM 87544. How to get here From Albuquerque take I-25 north to Santa Fe (take NM 599 for most direct route), then US 84/285 north to Pojoaque. At Pojoaque take the NM 502 exit

116

Building Performance Simulation  

E-Print Network [OSTI]

Y (2008). DeSTAn integrated building simulation toolkit,Part ? : Fundamentals. Building Simulation, 1: 95 ? 110.Y (2008). DeSTAn integrated building simulation toolkit,

Hong, Tianzhen

2014-01-01T23:59:59.000Z

117

Digestion Simulations  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Digestion Simulations Digestion Simulations Name: Lisa Location: N/A Country: N/A Date: N/A Question: My 5th grade students are beginning an experiment next week and their hypothesis involves edibility(edibleness?). Is there a way to replicate the stomach in, say, a bottle?? Are there ways to test for edibleness(?) without actually ingesting the experiment yourself? Replies: I would not recommend the idea of a bottle stomach. The stomach digests only proteins anyway with HCl [pH 1.0] which is very, very strong acid that will burn seriously if in contact with skin. The intestine is just as much responsible for digestion of lipids [bile], carbohydrates and remaining proteins using enzymes, many of these you do not want to be handling, let alone purchase. As a high school teacher, I have lab exercises dealing with digestion, but I can not recommend any of these unless you are set up with a functional science laboratory and all the safety equipment necessary.

118

Direct Discharge Permit (Vermont)  

Broader source: Energy.gov [DOE]

A direct discharge permit is required if a project involves the discharge of pollutants to state waters. For generation purposes, this involves the withdrawal of surface water for cooling purposes...

119

Directed transport in equilibrium  

E-Print Network [OSTI]

We investigate how a microscopic system, which can move only in one direction, comes to equilibrium with a heat-bath. To understand this problem, we investigate a symmetry broken dimer constrained to move in a particular direction when in contact with a uniform heat-bath at a constant temperature. The dimer is not driven by any external force. The system gains kinetic energy from the heat-bath and that the system can only use in directed transport. At the hard core collision limit between the particles of the dimer, we show by exact analytic calculations and complementary numerical results that the dimer undergoes steady directed transport by attaining a stationary distribution for a relevant degree of freedom. Our observation, being perfectly consistent with the {\\it second law of thermodynamics}, leads to a generalization of the existing {\\it Brownian ratchet} paradigm and points out some important limitations of {\\it Fokker-Planck} dynamics.

Bhattacharyay, A

2010-01-01T23:59:59.000Z

120

Surface Wind Direction Variability  

Science Journals Connector (OSTI)

Common large shifts of wind direction in the weak-wind nocturnal boundary layer are poorly understood and are not adequately captured by numerical models and statistical parameterizations. The current study examines 15 datasets representing a ...

Larry Mahrt

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Art Directable Tornadoes  

E-Print Network [OSTI]

......................................................................... 25 2. Directional Force ........................................................... 26 3. Vortex Force .................................................................. 26 4. Lattice... ................................................................... 7 7 Tornado in its rope stage before disappearing ........................................... 9 8 Fire vortex and Waterspout ........................................................................ 10 9 Landspout and Gustnado...

Dwivedi, Ravindra

2011-08-08T23:59:59.000Z

122

Refrigerant directly cooled capacitors  

DOE Patents [OSTI]

The invention is a direct contact refrigerant cooling system using a refrigerant floating loop having a refrigerant and refrigeration devices. The cooling system has at least one hermetic container disposed in the refrigerant floating loop. The hermetic container has at least one electronic component selected from the group consisting of capacitors, power electronic switches and gating signal module. The refrigerant is in direct contact with the electronic component.

Hsu, John S. (Oak Ridge, TN); Seiber, Larry E. (Oak Ridge, TN); Marlino, Laura D. (Oak Ridge, TN); Ayers, Curtis W. (Kingston, TN)

2007-09-11T23:59:59.000Z

123

New Directions in Direct Dark Matter Searches  

E-Print Network [OSTI]

I present the status of direct dark matter detection with specific attention to the experimental results and their phenomenological interpretation in terms of dark matter interactions. In particular I review a new and more general approach to study signals in this field based on non-relativistic operators which parametrize more efficiently the dark matter-nucleus interactions in terms of a very limited number of relevant degrees of freedom. Then I list the major experimental results, pointing out the main uncertainties that affect the theoretical interpretation of the data. Finally, since the underlying theory that describes both the dark matter and the standard model fields is unknown, I address the uncertainties coming from the nature of the interaction. In particular, the phenomenology of a class of models in which the interaction between dark matter particles and target nuclei is of a long-range type is discussed.

Paolo Panci

2014-02-06T23:59:59.000Z

124

Advances and new directions in direct liquefaction  

SciTech Connect (OSTI)

With advance in single stage processes such as H-Coal, EDS and SRC, and refining and upgrading of coal liquids by Chevron and UOP, the direct liquefaction process has continuously evolved to the present two-stage catalytic configuration, which produces the highest liquid yield and product quality of any process worldwide. The Two Stage Liquefaction (TSL) process has been successfully applied to bituminous and subbituminous coals, overcoming problems associated with earlier processes. But, potential for additional improvement is recognized in several areas: cleaning coal prior to liquefaction; low temperature and pressure preconditioning of feed coal; novel catalysts development to arrest regressive reactions and improve hydrotreatment and cracking reactions; improvement in hydrocarbon value recovery and reduced energy rejection by alternate bottoms processing techniques. In this paper, after discussing briefly the history of liquefaction and development of the TSL process, present potential areas for research and development are presented.

Rao, S.N.; Schindler, H.D.; McGurl, G.V.

1988-01-01T23:59:59.000Z

125

Peptide partitioning properties from direct insertion studies  

SciTech Connect (OSTI)

Partitioning properties of polypeptides are at the heart of biological membrane phenomena and their precise quantification is vital for ab-initio structure prediction and the accurate simulation of membrane protein folding and function. Recently the cellular translocon machinery has been employed to determine membrane insertion propensities and transfer energetics for a series of polyleucine segments embedded in a carrier sequence. We show here that the insertion propensity, pathway, and transfer energetics into synthetic POPC bilayers can be fully described by direct atomistic peptide partitioning simulations. The insertion probability as a function of peptide length follows two-state Boltzmann statistics, in agreement with the experiments. The simulations expose a systematic offset between translocon-mediated and direct insertion free energies. Compared to the experiment the insertion threshold is shifted toward shorter peptides by 2 leucine residues. The simulations reveal many hitherto unknown atomic-resolution details about the partitioning process and promise to provide a powerful tool for urgently needed calibration of lipid parameters to match experimentally observed peptide transfer energies.

Ulmschneider, Martin [University of Oxford; Smith, Jeremy C [ORNL; Ulmschneider, Jakob [University of Heidelberg

2010-06-01T23:59:59.000Z

126

A New Motorcycle Simulator Platform: Mechatronics Design, Dynamics Modeling  

E-Print Network [OSTI]

A New Motorcycle Simulator Platform: Mechatronics Design, Dynamics Modeling and Control L. Nehaoua of these techniques to other simulators (cars and motorcycles) is possible but not direct. Indeed, the dynamics motorcycle driving simulators were build. The first prototype was developed by Honda in 1988

Paris-Sud XI, Université de

127

DeFrees Small Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Wave Basin Wave Basin Jump to: navigation, search Basic Specifications Facility Name DeFrees Small Wave Basin Overseeing Organization Cornell University Hydrodynamics Hydrodynamic Testing Facility Type Wave Basin Length(m) 15.0 Beam(m) 0.8 Depth(m) 0.9 Water Type Freshwater Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.3 Maximum Wave Height(m) at Wave Period(s) 3.0 Maximum Wave Length(m) 30 Wave Period Range(s) 3.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Computer controlled hydraulic paddle, arbitrary wave shape possible Wave Direction Uni-Directional Simulated Beach Yes Description of Beach 1:10 sloping glass with dissipative horsehair covering if needed

128

Ohmsett Tow Tank | Open Energy Information  

Open Energy Info (EERE)

Ohmsett Tow Tank Ohmsett Tow Tank Jump to: navigation, search Basic Specifications Facility Name Ohmsett Tow Tank Overseeing Organization Ohmsett Hydrodynamic Testing Facility Type Tow Tank Length(m) 203.0 Beam(m) 19.8 Depth(m) 2.4 Water Type Freshwater Cost(per day) Contact POC Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 3.4 Length of Effective Tow(m) 155.0 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.9 Maximum Wave Height(m) at Wave Period(s) 4.1 Maximum Wave Length(m) 18 Wave Period Range(s) 4.1 Current Velocity Range(m/s) 3.4 Programmable Wavemaking Yes Wavemaking Description Programmable frequency Wave Direction Uni-Directional Simulated Beach Yes Description of Beach Wave dampening at downstream end Channel/Tunnel/Flume

129

MHL Tow Tank | Open Energy Information  

Open Energy Info (EERE)

Tow Tank Tow Tank Jump to: navigation, search Basic Specifications Facility Name MHL Tow Tank Overseeing Organization University of Michigan Hydrodynamics Hydrodynamic Testing Facility Type Tow Tank Length(m) 109.7 Beam(m) 6.7 Depth(m) 3.7 Cost(per day) $2000 (+ Labor/Materials) Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 6.7 Length of Effective Tow(m) 103.6 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.5 Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Regular and irregular wave spectrum Wave Direction Uni-Directional Simulated Beach Yes Description of Beach Concrete beach Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None

130

MHL 2D Wind/Wave | Open Energy Information  

Open Energy Info (EERE)

MHL 2D Wind/Wave MHL 2D Wind/Wave Jump to: navigation, search Basic Specifications Facility Name MHL 2D Wind/Wave Overseeing Organization University of Michigan Hydrodynamics Hydrodynamic Testing Facility Type Tunnel Length(m) 35.1 Beam(m) 0.7 Depth(m) 1.2 Cost(per day) $2000 (+ Labor/Materials) Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.2 Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Regular and irregular wave spectrum Wave Direction Uni-Directional Simulated Beach Yes Description of Beach Removable beach Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Recirculating No Wind Capabilities Wind Capabilities Yes Wind Velocity Range(m/s) 20.4

131

Alden Small Flume | Open Energy Information  

Open Energy Info (EERE)

Flume Flume Jump to: navigation, search Basic Specifications Facility Name Alden Small Flume Overseeing Organization Alden Research Laboratory, Inc Hydrodynamic Testing Facility Type Flume Length(m) 17.1 Beam(m) 1.8 Depth(m) 1.8 Water Type Freshwater Cost(per day) $2500/week Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.2 Maximum Wave Length(m) Variable Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Period adjustable electronically, height adjustable mechanically Wave Direction Uni-Directional Simulated Beach No Channel/Tunnel/Flume Channel/Tunnel/Flume Yes Velocity(m/s) >0.9 Recirculating No Wind Capabilities Wind Capabilities Yes

132

Hinsdale Wave Basin 1 | Open Energy Information  

Open Energy Info (EERE)

Hinsdale Wave Basin 1 Hinsdale Wave Basin 1 Jump to: navigation, search Basic Specifications Facility Name Hinsdale Wave Basin 1 Overseeing Organization Oregon State University Hydrodynamics Hydrodynamic Testing Facility Type Wave Basin Length(m) 104.0 Beam(m) 3.7 Depth(m) 4.6 Cost(per day) $3500 Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 1.8 Maximum Wave Height(m) at Wave Period(s) 10.0 Wave Period Range(s) 10.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Monochromatic waves (cnoidal, Stokes, Airy), solitary waves, user-defined free surface timeseries or board displacement timeseries for random waves Wave Direction Uni-Directional Simulated Beach Yes Description of Beach 12' by 12' concrete slabs anchored to flume walls

133

Coastal Inlet Model Facility | Open Energy Information  

Open Energy Info (EERE)

Inlet Model Facility Inlet Model Facility Jump to: navigation, search Basic Specifications Facility Name Coastal Inlet Model Facility Overseeing Organization United States Army Corp of Engineers (ERDC) Hydrodynamic Testing Facility Type Wave Basin Length(m) 103.6 Beam(m) 48.8 Depth(m) 0.6 Water Type Freshwater Cost(per day) Contact POC Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.2 Maximum Wave Height(m) at Wave Period(s) 2.3 Wave Period Range(s) 2.3 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wave Direction Uni-Directional Simulated Beach No Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None Control and Data Acquisition Description Automated data acquisition and control system

134

Los Angeles and Long Beach Harbors Model | Open Energy Information  

Open Energy Info (EERE)

and Long Beach Harbors Model and Long Beach Harbors Model Jump to: navigation, search Basic Specifications Facility Name Los Angeles and Long Beach Harbors Model Overseeing Organization United States Army Corp of Engineers (ERDC) Hydrodynamic Testing Facility Type Wave Basin Length(m) 67.1 Beam(m) 79.2 Depth(m) 0.9 Water Type Freshwater Cost(per day) Contact POC Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.1 Maximum Wave Height(m) at Wave Period(s) 2.0 Wave Period Range(s) 2.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wave Direction Uni-Directional Simulated Beach Yes Description of Beach Point Fermin to Huntington Beach, CA Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities

135

MIT Tow Tank | Open Energy Information  

Open Energy Info (EERE)

MIT Tow Tank MIT Tow Tank Overseeing Organization Massachusetts Institute of Technology Hydrodynamics Hydrodynamic Testing Facility Type Tow Tank Length(m) 36.6 Beam(m) 2.4 Depth(m) 1.2 Water Type Saltwater Cost(per day) $750 Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 1.5 Length of Effective Tow(m) 27.4 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.1 Maximum Wave Height(m) at Wave Period(s) 3.0 Maximum Wave Length(m) 4.6 Wave Period Range(s) 3.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Arbitrary spectrum Wave Direction Uni-Directional Simulated Beach No Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None Control and Data Acquisition

136

Lakefront Tow Tank | Open Energy Information  

Open Energy Info (EERE)

Lakefront Tow Tank Lakefront Tow Tank Jump to: navigation, search Basic Specifications Facility Name Lakefront Tow Tank Overseeing Organization University of New Orleans Hydrodynamic Testing Facility Type Tow Tank Length(m) 36.6 Beam(m) 4.9 Depth(m) 1.8 Cost(per day) $1200 Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 2.7 Length of Effective Tow(m) 25.9 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.5 Maximum Wave Length(m) 22 Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Regular random and transient waves Spectra include ISSC, JONSWAP, Bretschneider, Pierson-Moskowitz and custom user-defined. Wave Direction Uni-Directional Simulated Beach Yes Description of Beach Aluminum segmented arch

137

L-Shaped Flume Wave Basin | Open Energy Information  

Open Energy Info (EERE)

L-Shaped Flume Wave Basin L-Shaped Flume Wave Basin Jump to: navigation, search Basic Specifications Facility Name L-Shaped Flume Wave Basin Overseeing Organization United States Army Corp of Engineers (ERDC) Hydrodynamic Testing Facility Type Wave Basin Length(m) 76.2 Beam(m) 15.2 Depth(m) 1.8 Water Type Freshwater Special Physical Features Contact POC Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.6 Maximum Wave Height(m) at Wave Period(s) 10.0 Wave Period Range(s) 10.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wave Direction Uni-Directional Simulated Beach No Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None Control and Data Acquisition Description Automated data acquisition and control sys

138

Davidson Laboratory Tow Tank | Open Energy Information  

Open Energy Info (EERE)

Laboratory Tow Tank Laboratory Tow Tank Jump to: navigation, search Basic Specifications Facility Name Davidson Laboratory Tow Tank Overseeing Organization Stevens Institute of Technology Hydrodynamic Testing Facility Type Tow Tank Length(m) 97.5 Beam(m) 4.9 Depth(m) 2.0 Water Type Freshwater Cost(per day) Contact POC Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 18.3 Length of Effective Tow(m) 30.5 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.5 Maximum Wave Height(m) at Wave Period(s) 4.0 Maximum Wave Length(m) 15.2 Wave Period Range(s) 4.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Menu driven selection of standard spectra or user specified Wave Direction Uni-Directional Simulated Beach Yes

139

DeFrees Large Wave Basin | Open Energy Information  

Open Energy Info (EERE)

Large Wave Basin Large Wave Basin Jump to: navigation, search Basic Specifications Facility Name DeFrees Large Wave Basin Overseeing Organization Cornell University Hydrodynamics Hydrodynamic Testing Facility Type Wave Basin Length(m) 32.0 Beam(m) 0.6 Depth(m) 0.9 Water Type Freshwater Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.5 Maximum Wave Height(m) at Wave Period(s) 3.0 Maximum Wave Length(m) 64 Wave Period Range(s) 3.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Computer controlled 4m hydraulic wave paddle stroke allows a series of solitary waves to be generated; arbitrary wave shape possible Wave Direction Uni-Directional Simulated Beach Yes

140

Coastal Harbors Modeling Facility | Open Energy Information  

Open Energy Info (EERE)

Modeling Facility Modeling Facility Jump to: navigation, search Basic Specifications Facility Name Coastal Harbors Modeling Facility Overseeing Organization United States Army Corp of Engineers (ERDC) Hydrodynamic Testing Facility Type Wave Basin Length(m) 121.9 Beam(m) 48.8 Depth(m) 0.5 Water Type Freshwater Cost(per day) Contact POC Towing Capabilities Towing Capabilities None Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.2 Maximum Wave Height(m) at Wave Period(s) 2.3 Wave Period Range(s) 2.3 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wave Direction Uni-Directional Simulated Beach No Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None Control and Data Acquisition Description Automated data acquisition and control system

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

University of Iowa Wave Basin | Open Energy Information  

Open Energy Info (EERE)

University of Iowa Wave Basin University of Iowa Wave Basin Overseeing Organization University of Iowa Hydrodynamic Testing Facility Type Wave Basin Length(m) 40.0 Beam(m) 20.0 Depth(m) 3.0 Cost(per day) Contact POC Special Physical Features Towed 3DPIV; contactless motion tracking; free surface measurement mappingv Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 2.5 Length of Effective Tow(m) 25.0 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.6 Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Fully programmable for regular or irregular waves Wave Direction Uni-Directional Simulated Beach Yes Description of Beach Trusses overlaid with lattice and matting Channel/Tunnel/Flume

142

Understanding Manufacturing Systems with a Learning Historian for User-Directed Experimentation  

E-Print Network [OSTI]

a wide variety of important problems in manufacturing and other complex systems. In addition, simulation1 Understanding Manufacturing Systems with a Learning Historian for User-Directed Experimentation to improve user-directed experimentation with discrete event simulation models of manufacturing systems

Golbeck, Jennifer

143

Understanding Manufacturing Systems with a Learning Historian for UserDirected Experimentation  

E-Print Network [OSTI]

a wide variety of important problems in manufacturing and other complex systems. In addition, simulation1 Understanding Manufacturing Systems with a Learning Historian for User­Directed Experimentation to improve user­directed experimentation with discrete event simulation models of manufacturing systems

Golbeck, Jennifer

144

Directional gamma detector  

DOE Patents [OSTI]

An improved directional gamma radiation detector has a collector sandwiched etween two layers of insulation of varying thicknesses. The collector and insulation layers are contained within an evacuated casing, or emitter, which releases electrons upon exposure to gamma radiation. Delayed electrons and electrons entering the collector at oblique angles are attenuated as they pass through the insulation layers on route to the collector.

LeVert, Francis E. (Downers Grove, Knoxville, TN); Cox, Samson A. (Downers Grove, IL)

1981-01-01T23:59:59.000Z

145

Extension of DOE Directives  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

This Notice extends the following directives until 2/16/04: DOE N 205.2, Foreign National Access to DOE Cyber Systems, and DOE N 205.3, Password Generation, Protection, and Use, dated 11/23/99-7/1/00.

2003-02-24T23:59:59.000Z

146

CFD simulation of airflow over a regular array of cubes. Part I: Three-dimensional simulation of the flow and validation with wind-tunnel measurements  

Science Journals Connector (OSTI)

Air flow inside an array of cubes is simulated. Cubes (edge length 0.15m) are arranged in a regular array, separated by 0.15m in the streamwise and spanwise directions. Numerical simulations are performed based...

Jose Luis Santiago; Alberto Martilli; Fernando Martn

2007-03-01T23:59:59.000Z

147

Plasma Simulation Program  

SciTech Connect (OSTI)

Many others in the fusion energy and advanced scientific computing communities participated in the development of this plan. The core planning team is grateful for their important contributions. This summary is meant as a quick overview the Fusion Simulation Program's (FSP's) purpose and intentions. There are several additional documents referenced within this one and all are supplemental or flow down from this Program Plan. The overall science goal of the DOE Office of Fusion Energy Sciences (FES) Fusion Simulation Program (FSP) is to develop predictive simulation capability for magnetically confined fusion plasmas at an unprecedented level of integration and fidelity. This will directly support and enable effective U.S. participation in International Thermonuclear Experimental Reactor (ITER) research and the overall mission of delivering practical fusion energy. The FSP will address a rich set of scientific issues together with experimental programs, producing validated integrated physics results. This is very well aligned with the mission of the ITER Organization to coordinate with its members the integrated modeling and control of fusion plasmas, including benchmarking and validation activities. [1]. Initial FSP research will focus on two critical Integrated Science Application (ISA) areas: ISA1, the plasma edge; and ISA2, whole device modeling (WDM) including disruption avoidance. The first of these problems involves the narrow plasma boundary layer and its complex interactions with the plasma core and the surrounding material wall. The second requires development of a computationally tractable, but comprehensive model that describes all equilibrium and dynamic processes at a sufficient level of detail to provide useful prediction of the temporal evolution of fusion plasma experiments. The initial driver for the whole device model will be prediction and avoidance of discharge-terminating disruptions, especially at high performance, which are a critical impediment to successful operation of machines like ITER. If disruptions prove unable to be avoided, their associated dynamics and effects will be addressed in the next phase of the FSP.

Greenwald, Martin

2011-10-04T23:59:59.000Z

148

High-Performance Beam Simulator for the LANSCE Linac  

SciTech Connect (OSTI)

A high performance multiparticle tracking simulator is currently under development at Los Alamos. The heart of the simulator is based upon the beam dynamics simulation algorithms of the PARMILA code, but implemented in C++ on Graphics Processing Unit (GPU) hardware using NVIDIA's CUDA platform. Linac operating set points are provided to the simulator via the EPICS control system so that changes of the real time linac parameters are tracked and the simulation results updated automatically. This simulator will provide valuable insight into the beam dynamics along a linac in pseudo real-time, especially where direct measurements of the beam properties do not exist. Details regarding the approach, benefits and performance are presented.

Pang, Xiaoying [Los Alamos National Laboratory; Rybarcyk, Lawrence J. [Los Alamos National Laboratory; Baily, Scott A. [Los Alamos National Laboratory

2012-05-14T23:59:59.000Z

149

Development of directional capabilities to an ultradeep water dynamic kill simulator and simulations runs  

E-Print Network [OSTI]

, the increasing demand of oil and gas is the impetus to search for oil in more difficult and challenging areas. One challenging area is offshore in ultradeep water, with water depths greater than 5000 ft. This is the new arena for drilling technology...

Meier, Hector Ulysses

2005-11-01T23:59:59.000Z

150

Letter: Direction and Guidance for Implementing Direct DOE Relationship &  

Broader source: Energy.gov (indexed) [DOE]

Letter: Direction and Guidance for Implementing Direct DOE Letter: Direction and Guidance for Implementing Direct DOE Relationship & Funding for EMSSABs Letter: Direction and Guidance for Implementing Direct DOE Relationship & Funding for EMSSABs From: Assistant Secretary, Jessie Hill Roberson (EM-11) To: Mr. Monte Wilson, Chair, INEEL Citizens Advisory Board This letter is in response to a November 21, 2003 letter regarding direction and guidance for implementing direct DOE relationship and funding for Environmental Management Site Specific Advisory Boards. Roberson Letter - December 12, 2003 More Documents & Publications Letter: Progress in Implementing a Direct DOE Relationship & Funding for the EMSSABs Letter: Mission, Objectives & Scope of the Site Specific Advisory Board Memorandum: Direction and Guidance for Implementing Direct DOE Relationship

151

Letter: Direction and Guidance for Implementing Direct DOE Relationship &  

Broader source: Energy.gov (indexed) [DOE]

Letter: Direction and Guidance for Implementing Direct DOE Letter: Direction and Guidance for Implementing Direct DOE Relationship & Funding for EMSSABs Letter: Direction and Guidance for Implementing Direct DOE Relationship & Funding for EMSSABs From: Assistant Secretary, Jessie Hill Roberson (EM-11) To: Mr. Monte Wilson, Chair, INEEL Citizens Advisory Board This letter is in response to a November 21, 2003 letter regarding direction and guidance for implementing direct DOE relationship and funding for Environmental Management Site Specific Advisory Boards. Roberson Letter - December 12, 2003 More Documents & Publications Letter: Progress in Implementing a Direct DOE Relationship & Funding for the EMSSABs Letter: Mission, Objectives & Scope of the Site Specific Advisory Board Memorandum: Direction and Guidance for Implementing Direct DOE Relationship

152

Mesoscale Simulations of Power Compaction  

SciTech Connect (OSTI)

Mesoscale 3D simulations of metal and ceramic powder compaction in shock waves have been performed with an Eulerian hydrocode GEODYN. The approach was validated by simulating shock compaction of porous well-characterized ductile metal using Steinberg material model. Results of the simulations with handbook values for parameters of solid 2024 aluminum have good agreement with experimental compaction curves and wave profiles. Brittle ceramic materials are not so well studied as metals, so material model for ceramic (tungsten carbide) has been fitted to shock compression experiments of non-porous samples and further calibrated to match experimental compaction curves. Direct simulations of gas gun experiments with ceramic powder have been performed and showed good agreement with experimental data. Numerical shock wave profile has same character and thickness as measured with VISAR. Numerical results show reshock states above the single-shock Hugoniot line also observed in experiments. They found that to receive good quantitative agreement with experiment it is essential to perform 3D simulations.

Lomov, I; Fujino, D; Antoun, T; Liu, B

2009-08-06T23:59:59.000Z

153

Radiation in molecular dynamic simulations  

SciTech Connect (OSTI)

Hot dense radiative (HDR) plasmas common to Inertial Confinement Fusion (ICF) and stellar interiors have high temperature (a few hundred eV to tens of keV), high density (tens to hundreds of g/cc) and high pressure (hundreds of Megabars to thousands of Gigabars). Typically, such plasmas undergo collisional, radiative, atomic and possibly thermonuclear processes. In order to describe HDR plasmas, computational physicists in ICF and astrophysics use atomic-scale microphysical models implemented in various simulation codes. Experimental validation of the models used to describe HDR plasmas are difficult to perform. Direct Numerical Simulation (DNS) of the many-body interactions of plasmas is a promising approach to model validation but, previous work either relies on the collisionless approximation or ignores radiation. We present a new numerical simulation technique to address a currently unsolved problem: the extension of molecular dynamics to collisional plasmas including emission and absorption of radiation. The new technique passes a key test: it relaxes to a blackbody spectrum for a plasma in local thermodynamic equilibrium. This new tool also provides a method for assessing the accuracy of energy and momentum exchange models in hot dense plasmas. As an example, we simulate the evolution of non-equilibrium electron, ion, and radiation temperatures for a hydrogen plasma using the new molecular dynamics simulation capability.

Glosli, J; Graziani, F; More, R; Murillo, M; Streitz, F; Surh, M

2008-10-13T23:59:59.000Z

154

International comparison of passive solar simulation codes  

SciTech Connect (OSTI)

Two software-software comparisons of passive solar simulation codes have been conducted by the Passive Solar Applications Group of the Committee on the Challenges to Modern Society. These exercises have involved the simulation of hypothetical Trombe wall and direct gain buildings located in Madison, Wisconsin. The countries that have participated in the exercise include Canada, Denmark, France, and the United States. All results available at the time of writing are discussed in this report.

Wray, W.O.

1980-01-01T23:59:59.000Z

155

An Annotated Bibliography of High-Voltage Direct-Current Transmission and Flexible AC Transmission (FACTS) Devices, 1991-1993.  

SciTech Connect (OSTI)

References are contained for HVDC systems, converter stations and components, overhead transmission lines, cable transmission, system design and operations, simulation of high voltage direct current systems, high-voltage direct current installations, and flexible AC transmission system (FACTS).

Litzenberger, Wayne; Lava, Val

1994-08-01T23:59:59.000Z

156

Breakout Session -- TEC Direction  

Broader source: Energy.gov (indexed) [DOE]

III: TEC III: TEC Direction and Priorities Presented to: Transportation External Coordination Working Group Presented by: Alex Thrower Office of Logistics Management February 7, 2008 San Antonio, Texas 2 Topics of Discussion * Transportation External Coordination Working Group (TEC) charter and membership * Topic group functions * Meeting format 3 TEC Charter and Membership * Mission - TEC was formed in 1992 to improve coordination among the Department of Energy (DOE) and external groups interested in the Department's transportation activities The Office of Civilian Radioactive Waste Management (OCRWM) co-chairs TEC with DOE's Environmental Management Program Provides an opportunity for broad based input and information exchange from varied organizations - Members meet semi-annually to participate in

157

Home: Directives, Delegations, and Requirements  

Broader source: All U.S. Department of Energy (DOE) Office Webpages

content. | Skip to navigation content. | Skip to navigation Site Map Contact Us Current Documents Archived Documents Entire Site only in current section Advanced Search... U.S. Department of Energy Office of Management Directives, Delegations, and Requirements Sections Home Directives Current Directives Draft Directives Archives Delegations Current Delegations Current Designations Rescinded Organizations' Assignment of Responsibility Development & Review RevCom Writers' Tools DPC Corner References News and Updates Help Personal tools You are here: Office of Management » Directives, Delegations, and Requirements Info Home Directives are the Department of Energy's primary means of establishing policies, requirements, responsibilities, and procedures for Departmental elements and contractors. Directive

158

Directional emission of stadium-shaped micro-lasers  

E-Print Network [OSTI]

The far-field emission of two dimensional (2D) stadium-shaped dielectric cavities is investigated. Micro-lasers with such shape present a highly directional emission. We provide experimental evidence of the dependance of the emission directionality on the shape of the stadium, in good agreement with ray numerical simulations. We develop a simple geometrical optics model which permits to explain analytically main observed features. Wave numerical calculations confirm the results.

M. Lebental; J. -S. Lauret; J. Zyss; C. Schmit; E. Bogomolny

2006-09-01T23:59:59.000Z

159

3-D GRMHD Simulations of Generating Jets  

E-Print Network [OSTI]

We have performed a first fully 3-D GRMHD simulation with Schwarzschild black hole with a free falling corona. The initial simulation results show that a jet is created as in the previous simulations using the axisymmetric geometry with the mirror symmetry at the equator. However, the time to generate the jet is longer than in the 2-D axisymmetric simulations. We expect that due to the additional freedom in the azimuthal dimension without axisymmetry with respect to the z axis and reflection symmetry with respect to the equatorial plane, the dynamics of jet formation can be modified. Further simulations are required for the study of instabilities along the azimuthal direction such as accretion-eject instability

Nishikawa, K I; Shibata, K; Kudoh, T; Sol, H

2002-01-01T23:59:59.000Z

160

3-D GRMHD Simulations of Generating Jets  

E-Print Network [OSTI]

We have performed a first fully 3-D GRMHD simulation with Schwarzschild black hole with a free falling corona. The initial simulation results show that a jet is created as in the previous simulations using the axisymmetric geometry with the mirror symmetry at the equator. However, the time to generate the jet is longer than in the 2-D axisymmetric simulations. We expect that due to the additional freedom in the azimuthal dimension without axisymmetry with respect to the z axis and reflection symmetry with respect to the equatorial plane, the dynamics of jet formation can be modified. Further simulations are required for the study of instabilities along the azimuthal direction such as accretion-eject instability

K. -I. Nishikawa; S. Koide; K. Shibata; T. Kudoh; H. Sol

2002-08-05T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Direct Aerosol Forcing Uncertainty  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Understanding sources of uncertainty in aerosol direct radiative forcing (DRF), the difference in a given radiative flux component with and without aerosol, is essential to quantifying changes in Earth's radiation budget. We examine the uncertainty in DRF due to measurement uncertainty in the quantities on which it depends: aerosol optical depth, single scattering albedo, asymmetry parameter, solar geometry, and surface albedo. Direct radiative forcing at the top of the atmosphere and at the surface as well as sensitivities, the changes in DRF in response to unit changes in individual aerosol or surface properties, are calculated at three locations representing distinct aerosol types and radiative environments. The uncertainty in DRF associated with a given property is computed as the product of the sensitivity and typical measurement uncertainty in the respective aerosol or surface property. Sensitivity and uncertainty values permit estimation of total uncertainty in calculated DRF and identification of properties that most limit accuracy in estimating forcing. Total uncertainties in modeled local diurnally averaged forcing range from 0.2 to 1.3 W m-2 (42 to 20%) depending on location (from tropical to polar sites), solar zenith angle, surface reflectance, aerosol type, and aerosol optical depth. The largest contributor to total uncertainty in DRF is usually single scattering albedo; however decreasing measurement uncertainties for any property would increase accuracy in DRF. Comparison of two radiative transfer models suggests the contribution of modeling error is small compared to the total uncertainty although comparable to uncertainty arising from some individual properties.

Mccomiskey, Allison

162

Interferometric direction finding with a metamaterial detector  

SciTech Connect (OSTI)

We present measurements and analysis demonstrating useful direction finding of sources in the S band (24?GHz) using a metamaterial detector. An augmented metamaterial absorber that supports magnitude and phase measurement of the incident electric field, within each unit cell, is described. The metamaterial is implemented in a commercial printed circuit board process with off-board back-end electronics. We also discuss on-board back-end implementation strategies. Direction finding performance is analyzed for the fabricated metamaterial detector using simulated data and the standard algorithm, MUtiple SIgnal Classification. The performance of this complete system is characterized by its angular resolution as a function of radiation density at the detector. Sources with power outputs typical of mobile communication devices can be resolved at kilometer distances with sub-degree resolution and high frame rates.

Venkatesh, Suresh; Schurig, David, E-mail: david.schurig@utah.edu [Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112 (United States)] [Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112 (United States); Shrekenhamer, David; Padilla, Willie [Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 (United States)] [Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 (United States); Xu, Wangren; Sonkusale, Sameer [Department of Electrical and Computer Engineering, Tufts University, Medford, Massachusetts 02155 (United States)] [Department of Electrical and Computer Engineering, Tufts University, Medford, Massachusetts 02155 (United States)

2013-12-16T23:59:59.000Z

163

Mixed Mode Simulation Tools  

E-Print Network [OSTI]

ANSYS CFX, ANSYS Fluent, Autodesk Simulation CFD (formerly CFDesign), Autodesk Vasari, FloVENT, Flowdesigner,

Gandhi, Priya; Brager, Gail; Dutton, Spencer

2014-01-01T23:59:59.000Z

164

Foreign Direct Investment in U  

Gasoline and Diesel Fuel Update (EIA)

Foreign Direct Investment in U.S. Energy in 1998 Foreign Direct Investment in U.S. Energy in 1998 Foreign Direct Investment Foreign Direct Investment Foreign Direct Investment Foreign Direct Investment in U.S. Energy in U.S. Energy in U.S. Energy in U.S. Energy in 1998 in 1998 in 1998 in 1998 November 2000 Energy Information Administration/Foreign Direct Investment in U.S. Energy in 1998 Contacts This report was prepared in the Office of Energy Markets and End Use of the Energy Information Administration, U.S. Department of Energy, under the general direction of W. Calvin Kilgore. The project was directed by Mark E. Rodekohr, Director of the Energy Markets and Contingency Information Division (202) 586-1441, and Mary E. Northup, the Team Leader for Financial Analysis (202) 586-1383. Specific technical information concerning this

165

SRNL - Directions and Maps  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Map of SRS, with Georgia and South Carolina Map of SRS, with Georgia and South Carolina Directions and Maps The Savannah River National Laboratory is located at the Savannah River Site , a 310 square mile site located in the southeastern coastal area of the United States in the state of South Carolina. It is bordered to the west by the Savannah River and Georgia, and is close to several major cities, including Augusta and Savannah (Ga.), Columbia, Greenville, and Charleston (S.C.). It is in an area residents refer to as the Central Savannah River Area, or CSRA. The Aiken County Technology Laboratory (which houses SRNL's biotechnology laboratories and certain waste treatment technology laboratories) and the Center for Hydrogen Research are located at Aiken County's Savannah River Research Campus, located adjacent to SRS.

166

Memorandum: Direction and Guidance for Implementing Direct DOE Relationship  

Broader source: Energy.gov (indexed) [DOE]

Direction and Guidance for Implementing Direct DOE Direction and Guidance for Implementing Direct DOE Relationship & Funding for the EMSSAB Memorandum: Direction and Guidance for Implementing Direct DOE Relationship & Funding for the EMSSAB From: Designated Federal Officer, Sandra L. Waisley (EM-11) To: SSAB Members (G. Stegner, J. Reising, G. Bowman, T. Taylor, C. Gertz, B. Murphie, S. McCracken, M. Marvin, J. Rampe, A. Doswell, C. Anderson, B. Wethington, S. Brennan, K. Kozeliski, D. Dollins, P. Halsey, Y. Sherman, L. Bratcher, R. Warther, K. Klein, R. Schepens, F. Lockhart, J. Allison, R. Erickson, E. Sellers, K. Carlson, G. Boyd, R. Butler) The memorandum informs of Assistant Secrectary Roberson's direction and guidance for implementing a DOE direct relationship and funding approach for EM's Site-Specific Advisory Board (EMSSAB).

167

Implementing Feedback Control on a Novel Proximity Operations Simulation Platform  

E-Print Network [OSTI]

Recently, The Land, Air and Space Robotics (LASR) Laboratory has demonstrated a state-of-the-art proximity operations test bed that will revolutionize the concept of portable space systems simulation. The Holonomic Omni-directional Motion Emulation...

Aures-Cavalieri, Kurt Dale

2012-07-16T23:59:59.000Z

168

Robot Hardware Simulator  

E-Print Network [OSTI]

Robotics Simulator is to perform simulations of many heterogeneous types of robots all working within a single, virtual environment. The main components of this project are Robot Simulator, Environment Control Panel and Environment Simulator. Robot simulator consists of three parts: a robot hardware simulator, a robot control program, which will be user supplied, and an environment-based robot object. Robot control program can work with various robot hardware simulators via standard API. The robot hardware simulator will interface to the environment via requests for data from its sensor or requests for action from its actuators. The environment-based robots will be responsible for controlling the individual sensors, based on robot hardware simulator requests, and providing the appropriate data to the sensors, Environment control panel will be a standalone system that connects to the environment simulator to monitor and control the current simulation The environment simulator is the central component in the system. The environment simulator is responsible for keeping track of the actual state of the environment, including each robot. The environment simulator receives requests from simulated robots to read sensors, initiate actuators, and to send and receive communication.

unknown authors

169

Rank and directional entropy Rank and directional entropy  

E-Print Network [OSTI]

Rank and directional entropy Rank and directional entropy E. Arthur (Robbie) Robinson (Joint work with Ayse Sahin) The George Washington University Talk at KIAS, Seoul, Korea. September 27, 2010 #12;Rank and directional entropy Outline 1 Introduction 2 Finite rank, Z case 3 The formal definition 4 The Z2 case 5

Robinson Jr., E. Arthur (Robbie)

170

Laboratory Directed Research & Development | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Laboratory Directed Research & Development | National Nuclear Security Laboratory Directed Research & Development | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog The National Nuclear Security Administration Laboratory Directed Research & Development Home > About Us > Our Programs > Defense Programs > Future Science & Technology Programs > Office of Advanced Simulation and Computing and

171

Visualizations and Simulations from the Center for Simulation of Dynamic Response of Materials (ASC/ASAP)  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

In Phase 1 of the ASC/ASAP program, The Caltech Center for Simulation of Dynamic Response of Materials developed a proof of concept for a Virtual shock physics Test Facility (VTF) in which the full three-dimensional response of a variety of target materials can be simulated for a wide range of compressive, tensional, and shear loadings, including those produced by detonation of energetic materials. The VTF is being applied to a series of integrated multiphysics simulations each with direct relevance to fundamental scientific issues in the dynamic response of materials that in turn are directly connected to proposed and existing experiments. New generations of multiscale models and terascale simulations are being created. The ASC/ASAP Gallery provides access to visualizations in the areas of materials, fluids, solids, and those related to the VTF. A section of tools and resources is available, as well as the full text of a long list of graphics-rich publications.

172

Bioenergy Technologies Office New Directions  

Broader source: Energy.gov [DOE]

New Directions and New Business Opportunities for BETO Valerie Reed, Acting Director, BETO, U.S. Department of Energy

173

Dynamic Positioning Simulator Dynamic Positioning Simulator  

E-Print Network [OSTI]

Simulator 5 / 24 #12;Dynamic Positioning Simulator Dynamic Positioning Why Dynamic Positioning? Advantages Dynamic Positioning: No tugboats needed; Offshore set-up is quick; Power saving; Precision situations more on Ship: Wind Force Fw = 1 2 air V 2 rw CXw (rw )AT 1 2 air V 2 rw CYw (rw )AL Mw = 1 2 air V 2 rw CMw (rw

Vuik, Kees

174

Cofinal types of directed orders  

E-Print Network [OSTI]

, ) directed partial orders #12;Cofinal types (P, ), (Q, ) directed partial orders Tukey reducibility: (P orders Tukey reducibility: (P, ) T (Q, ) if f : P Q X P unbounded = f [X] Q unbounded g : Q P Y Q cofinal = g[Y ] P cofinal #12;Cofinal types (P, ), (Q, ) directed partial orders Tukey reducibility: (P

Mátrai, Tamás

175

Energy Distribution of Nanoflares in Three-Dimensional Simulations of  

E-Print Network [OSTI]

Energy Distribution of Nanoflares in Three-Dimensional Simulations of Coronal Heating Chung-Sang Ng of the energy distribution of solar flares, there have not been many results based on large-scale three-dimensional direct simulations due to obvious numerical difficulties. We will present energy distributions and other

Ng, Chung-Sang

176

SIMULATION TECHNIQUES IN HYPERSONIC LOW-DENSITY AEROTHERMODYNAMICS  

E-Print Network [OSTI]

SIMULATION TECHNIQUES IN HYPERSONIC LOW-DENSITY AEROTHERMODYNAMICS V. V. Riabov Rivier University, 420 South Main Street, Nashua, NH 03060, USA, vriabov@rivier.edu Hypersonic rarefied flows near-8] and hypersonic flights. The direct simulation Monte- Carlo (DSMC) method [9] is used to study the influence

Riabov, Vladimir V.

177

An approach to parallelizing the simulation of complicated modelica models  

Science Journals Connector (OSTI)

Designing embedded systems has become a complex and expensive task, and simulation and other analysis tools are taking on a bigger role in the overall design process. In an effort to speed up the design process, we present an algorithm for reducing the ... Keywords: directed acyclic graph, efficient simulation models, equation-based modeling, parallel scheduling

Joshua D. Carl, Gautam Biswas, Sandeep Neema, Ted Bapty

2014-07-01T23:59:59.000Z

178

Laboratory Directed Research and Development  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

performance simulations, but these models have a limited range of applicability. Two fracture modeling techniques -- the extended finite element method (XFEM) and the discrete...

179

Managed DirectX First Steps: Direct3D Basics and DirectX vs. GDI+  

Science Journals Connector (OSTI)

DirectX refers to a collection of Microsoft-created APIs and technologies that help developers more directly access the hardware features of a computer. It was originally released in 1996 as a way fo...

David Weller; Alexandre Santos Lobo

2004-01-01T23:59:59.000Z

180

Development of intelligent simulations at LLNL  

SciTech Connect (OSTI)

The Virtual Commander Project (VCom) is developing a capability for semiautomated optimal control of simulation entities. Properties of our control paradigm are goal-directed planning, hierarchical plan generation, automated fault detection, adaptive plan repair, and optimized cooperation and coordination among units, in addition to more conventional rule-driven behaviors. VCom has been applied to planning armor engagements at the battalion level and below. We are currently investigating movement-to-contact and fire-and-movement maneuvers. These capabilities will be demonstrated in April in conjunction with the Joint Conflict Model (JCM) a large, entity-level, constructive combat simulation. Both simulations have been developed to interoperate in a distributed computing environment using Distributed Interactive Simulation (DIS) protocols. Prototype applications have been demonstrated in other civilian and military contexts. A focus of our current work is the rapid prototyping of such applications.

Cunningham, C.T.

1994-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

European Lean Gasoline Direct Injection Vehicle Benchmark  

SciTech Connect (OSTI)

Lean Gasoline Direct Injection (LGDI) combustion is a promising technical path for achieving significant improvements in fuel efficiency while meeting future emissions requirements. Though Stoichiometric Gasoline Direct Injection (SGDI) technology is commercially available in a few vehicles on the American market, LGDI vehicles are not, but can be found in Europe. Oak Ridge National Laboratory (ORNL) obtained a European BMW 1-series fitted with a 2.0l LGDI engine. The vehicle was instrumented and commissioned on a chassis dynamometer. The engine and after-treatment performance and emissions were characterized over US drive cycles (Federal Test Procedure (FTP), the Highway Fuel Economy Test (HFET), and US06 Supplemental Federal Test Procedure (US06)) and steady state mappings. The vehicle micro hybrid features (engine stop-start and intelligent alternator) were benchmarked as well during the course of that study. The data was analyzed to quantify the benefits and drawbacks of the lean gasoline direct injection and micro hybrid technologies from a fuel economy and emissions perspectives with respect to the US market. Additionally that data will be formatted to develop, substantiate, and exercise vehicle simulations with conventional and advanced powertrains.

Chambon, Paul H [ORNL] [ORNL; Huff, Shean P [ORNL] [ORNL; Edwards, Kevin Dean [ORNL] [ORNL; Norman, Kevin M [ORNL] [ORNL; Prikhodko, Vitaly Y [ORNL] [ORNL; Thomas, John F [ORNL] [ORNL

2011-01-01T23:59:59.000Z

182

Terascale High-Fidelity Simulations of Turbulent Combustion with Detailed Chemistry: Spray Simulations  

SciTech Connect (OSTI)

The Terascale High-Fidelity Simulations of Turbulent Combustion (TSTC) project is a multi-university collaborative effort to develop a high-fidelity turbulent reacting flow simulation capability utilizing terascale, massively parallel computer technology. The main paradigm of the approach is direct numerical simulation (DNS) featuring the highest temporal and spatial accuracy, allowing quantitative observations of the fine-scale physics found in turbulent reacting flows as well as providing a useful tool for development of sub-models needed in device-level simulations. Under this component of the TSTC program the simulation code named S3D, developed and shared with coworkers at Sandia National Laboratories, has been enhanced with new numerical algorithms and physical models to provide predictive capabilities for turbulent liquid fuel spray dynamics. Major accomplishments include improved fundamental understanding of mixing and auto-ignition in multi-phase turbulent reactant mixtures and turbulent fuel injection spray jets.

Rutland, Christopher J.

2009-04-26T23:59:59.000Z

183

FY 2011 Third Quarter Report Estimate of Historical Aerosol Direct and Indirect Effects  

SciTech Connect (OSTI)

The global and annual mean aerosol direct and indirect effects estimated from Community Earth System Model (CESM) simulations are -0.06 W m-2 and -1.39 W m-2, respectively.

Koch, D

2011-06-22T23:59:59.000Z

184

Numerical modeling of combustion processes and pollutant formations in direct-injection diesel engines  

Science Journals Connector (OSTI)

The Representative Interactive Flamelet (RIF) concept has been applied to numerically simulate the combustion processes and pollutant formation in the direct injection...X formation including thermal NO path, pro...

Seong-Ku Kim; Joon Kyu Lee; Yong-Mo Kim; Jae-Hyun Ahn

2002-07-01T23:59:59.000Z

185

Three-dimensional track reconstruction for directional Dark Matter detection  

SciTech Connect (OSTI)

Directional detection of Dark Matter is a promising search strategy. However, to perform such detection, a given set of parameters has to be retrieved from the recoiling tracks: direction, sense and position in the detector volume. In order to optimize the track reconstruction and to fully exploit the data of forthcoming directional detectors, we present a likelihood method dedicated to 3D track reconstruction. This new analysis method is applied to the MIMAC detector. It requires a full simulation of track measurements in order to compare real tracks to simulated ones. We conclude that a good spatial resolution can be achieved, i.e. sub-mm in the anode plane and cm along the drift axis. This opens the possibility to perform a fiducialization of directional detectors. The angular resolution is shown to range between 20 to 80, depending on the recoil energy, which is however enough to achieve a high significance discovery of Dark Matter. On the contrary, we show that sense recognition capability of directional detectors depends strongly on the recoil energy and the drift distance, with small efficiency values (50%70%). We suggest not to consider this information either for exclusion or discovery of Dark Matter for recoils below 100 keV and then to focus on axial directional data.

Billard, J.; Mayet, F.; Santos, D., E-mail: billard@lpsc.in2p3.fr, E-mail: mayet@lpsc.in2p3.fr, E-mail: santos@lpsc.in2p3.fr [Laboratoire de Physique Subatomique et de Cosmologie, Universit Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut Nationale Polytechnique de Grenoble, 53 rue des Martyrs, Grenoble (France)

2012-04-01T23:59:59.000Z

186

Efficient and Scalable All-to-All Personalized Exchange for InfiniBand  

E-Print Network [OSTI]

· High performance ­ Low latency of lesser than 5us ­ Over 840 Mega Byte/s uni-directional bandwidth? ­ Can we utilize the InfiniBand RDMA and Gather/Scatter capabilities? ­ How can we achieve better of pinning is high ­ Solution for small messages: copy into a pre-registered buffer [liuj-ics03] ­ Cost

Panda, Dhabaleswar K.

187

NREL: Learning - Geothermal Direct Use  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct Use Direct Use Photo of alligators on a farm. Geothermally heated waters allow alligators to thrive on a farm in Colorado, where temperatures can drop below freezing. Geothermal reservoirs of hot water, which are found a few miles or more beneath the Earth's surface, can be used to provide heat directly. This is called the direct use of geothermal energy. Geothermal direct use has a long history, going back to when people began using hot springs for bathing, cooking food, and loosening feathers and skin from game. Today, hot springs are still used as spas. But there are now more sophisticated ways of using this geothermal resource. In modern direct-use systems, a well is drilled into a geothermal reservoir to provide a steady stream of hot water. The water is brought up through

188

LOFT Engineering Simulator  

SciTech Connect (OSTI)

The LOFT Engineering Simulator represents an attempt to develop a simulation with sufficient physical detail (solution of the conservation equations) for moderate accident simulation, but which will still run in real time and provide an interface for the operator to interact with the model. The LOFT Engineering Simulator is presently being used to assist the Augmented Operator Capability (AOC) Program. Part of the AOC program has developed techniques to support the Human Engineering Research for evaluating graphics displays in a nuclear reactor control room. The LOFT Engineering Simulator offers: (1) a unique means of supplying plant equivalent simulation data to drive the various graphics dislays under consideration; and (2) a technique to test and evaluate control strategy. This report describes the hardware and software used for the LOFT Engineering Simulator, including the graphics display computer.

Venhuizen, J.R.

1981-09-01T23:59:59.000Z

189

Policy Procedure Administrative Directive Title: _____________________________________  

E-Print Network [OSTI]

Policy ­ Procedure ­ Administrative Directive Title: _____________________________________ Policy-President _____________ See also: Related Policies, Procedures and Agreements: Relevant Legislation and Regulations: ____________________________________________________________________________ Background and Purpose: ____________________________________________________________________________ Policy

Northern British Columbia, University of

190

Direct cooled power electronics substrate  

DOE Patents [OSTI]

The disclosure describes directly cooling a three-dimensional, direct metallization (DM) layer in a power electronics device. To enable sufficient cooling, coolant flow channels are formed within the ceramic substrate. The direct metallization layer (typically copper) may be bonded to the ceramic substrate, and semiconductor chips (such as IGBT and diodes) may be soldered or sintered onto the direct metallization layer to form a power electronics module. Multiple modules may be attached to cooling headers that provide in-flow and out-flow of coolant through the channels in the ceramic substrate. The modules and cooling header assembly are preferably sized to fit inside the core of a toroidal shaped capacitor.

Wiles, Randy H [Powell, TN; Wereszczak, Andrew A [Oak Ridge, TN; Ayers, Curtis W. (Kingston, TN) [Kingston, TN; Lowe, Kirk T. (Knoxville, TN) [Knoxville, TN

2010-09-14T23:59:59.000Z

191

A NEW HIGH FREQUENCY GLOBAL-TO-DIRECT IRRADIANCE CONVERSION METHODOLOGY  

E-Print Network [OSTI]

, Navarra (Spain) Abstract In order to accurately simulate the behavior of a solar thermal power plant will improve results of solar thermal power plants simulations. Keywords: Direct Normal Irradiance (DNI by knowing this information with accuracy, it will be possible to predict the solar thermal power plant

Paris-Sud XI, Université de

192

An ontology for trajectory simulation  

Science Journals Connector (OSTI)

From the concept exploration for a weapon system to training simulators, from hardware-in-the-loop simulators to mission planning tools, trajectory simulations are used throughout the life cycle of a weapon system. A trajectory simulation can be defined ...

Umut Durak; Halit Oguztuzun; S. Kemal Ider

2006-12-01T23:59:59.000Z

193

Office of Nuclear Safety - Directives  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nuclear and Facility Safety Directives Nuclear and Facility Safety Directives The HSS Office of Nuclear Safety is the responsible office for the development, interpretation, and revision of the following Department of Energy (DOE) directives. Go to DOE's Directives Web Page to view these directives. DOE Order (O) 252.1A, Technical Standards Program DOE O 252.1A promotes DOE's use of Voluntary Consensus Standards (VCS) as the primary method for application of technical standards and establishes and manages the DOE Technical Standards Program (TSP) including technical standards development, information, activities, issues, and interactions. HS-30 Contact: Jeff Feit DOE Policy (P) 420.1, Department of Energy Nuclear Safety Policy DOE P 420.1, documents the Department's nuclear safety policy to design, construct, operate, and decommission its nuclear facilities in a manner that ensures adequate protection of workers, the public, and the environment.

194

DOE Directives | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

DOE Directives DOE Directives DOE Directives Directives are the Department of Energy's primary means to communicate and institutionalize directives and policies and to establish requirements, responsibilities, and procedures for Departmental elements and contractors. DOE O 413.3A - Program and Project Management for the Acquisition of Capital Assets DOE G 413.3-1 - Managing Design and Construction Using Systems Engineering for Use with DOE O 413.3A DOE G 413.3-2 - Quality Assurance Guide for Project Management DOE G 413.3-3 - Safeguards and Security for Program and Project Management DOE G 413.3-8 - Environmental Management (EM) Cleanup Projects DOE G 413.3-9 - U.S. Department of Energy Project Review Guide for Capital Asset Projects DOE G 413.3-10 - Earned Value Management System (EVMS)

195

Modeling bubble-vortex interactions Modeling and simulation of multiple bubble entrainment and interactions with two  

E-Print Network [OSTI]

Modeling bubble-vortex interactions Modeling and simulation of multiple bubble entrainment, OR 97331. (Dated: 5 November 2010) 1 #12;Modeling bubble-vortex interactions Simulations of bubble direct numerical simulation whereas motion of subgrid bubbles is modeled using Lagrangian track- ing

Apte, Sourabh V.

196

Carbon Nanotubes Potentialities in Directional Dark Matter Searches  

E-Print Network [OSTI]

We propose a new solution to the problem of dark matter directional detection based on large parallel arrays of carbon nanotubes. The phenomenon of ion channeling in single wall nanotubes is simulated to calculate the expected number of recoiling carbon ions, due to the hypothetical scattering with dark matter particles, subsequently being driven along their longitudinal extension. As shown by explicit calculation, the relative orientation of the carbon nanotube array with respect to the direction of motion of the Sun has an appreciable effect on the channeling probability of the struck ion and this provides the required detector anisotropic response.

L. M. Capparelli; G. Cavoto; D. Mazzilli; A. D. Polosa

2014-12-28T23:59:59.000Z

197

Whole Building Energy Simulation  

Broader source: Energy.gov [DOE]

Whole building energy simulation, also referred to as energy modeling, can and should be incorporated early during project planning to provide energy impact feedback for which design considerations...

198

Vehicle Modeling and Simulation  

Broader source: Energy.gov (indexed) [DOE]

* PHEV Simulations and Analysis - Travel Profile Database - PHEV Impact on Components - Integration with Renewable Fuels - PHEV Economics - PHEV Test Procedures * Route-Based...

199

Module bay with directed flow  

DOE Patents [OSTI]

A module bay requires less cleanroom airflow. A shaped gas inlet passage can allow cleanroom air into the module bay with flow velocity preferentially directed toward contaminant rich portions of a processing module in the module bay. Preferential gas flow direction can more efficiently purge contaminants from appropriate portions of the module bay, allowing a reduced cleanroom air flow rate for contaminant removal. A shelf extending from an air inlet slit in one wall of a module bay can direct air flowing therethrough toward contaminant-rich portions of the module bay, such as a junction between a lid and base of a processing module.

Torczynski, John R. (Albuquerque, NM)

2001-02-27T23:59:59.000Z

200

Dynamic procedure for filtered gyrokinetic simulations  

SciTech Connect (OSTI)

Large eddy simulations (LES) of gyrokinetic plasma turbulence are investigated as interesting candidates to decrease the computational cost. A dynamic procedure is implemented in the gene code, allowing for dynamic optimization of the free parameters of the LES models (setting the amplitudes of dissipative terms). Employing such LES methods, one recovers the free energy and heat flux spectra obtained from highly resolved direct numerical simulations. Systematic comparisons are performed for different values of the temperature gradient and magnetic shear, parameters which are of prime importance in ion temperature gradient driven turbulence. Moreover, the degree of anisotropy of the problem, which can vary with parameters, can be adapted dynamically by the method that shows gyrokinetic large eddy simulation to be a serious candidate to reduce numerical cost of gyrokinetic solvers.

Morel, P.; Banon Navarro, A.; Albrecht-Marc, M.; Carati, D. [Statistical and Plasma Physics Laboratory, Universite Libre de Bruxelles, Bruxelles 1050 (Belgium); Merz, F.; Goerler, T.; Jenko, F. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, D-85748 Garching (Germany)

2012-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Homeland Security Presidential Directive 7  

Broader source: Energy.gov (indexed) [DOE]

3 Homeland Security Presidential Directive/Hspd-7 3 Homeland Security Presidential Directive/Hspd-7 For Immediate Release Office of the Press Secretary December 17, 2003 December 17, 2003 Homeland Security Presidential Directive/Hspd-7 Subject: Critical Infrastructure Identification, Prioritization, and Protection Purpose (1) This directive establishes a national policy for Federal departments and agencies to identify and prioritize United States critical infrastructure and key resources and to protect them from terrorist attacks. Background (2) Terrorists seek to destroy, incapacitate, or exploit critical infrastructure and key resources across the United States to threaten national security, cause mass casualties, weaken our economy, and damage public morale and confidence. (3) America's open and technologically complex society includes a wide array of critical infrastructure

202

Sunlight Direct | Open Energy Information  

Open Energy Info (EERE)

Direct Direct Jump to: navigation, search Name Sunlight Direct Place San Diego, California Zip 92128 Sector Solar Product Developed a system that tracks and concentrates solar energy for distributed power generation Website http://www.sunlight-direct.com Coordinates 33.0013938°, -117.0735241° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.0013938,"lon":-117.0735241,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

203

Simulation Supported Decision Making  

E-Print Network [OSTI]

.S. Navy Nuclear Program · Decades of dynamic operations of hundreds of nuclear power plants withoutSimulation Supported Decision Making Gene Allen Naval Surface Warfare Center Carderock Division SI: TO PASS ON WHAT I KNOW on SIMULATION · CAREER FOCUS: HOW TO USE COMPUTERS TO DO HELP MAKE BETTER DECISIONS

204

Simulation in the future  

Science Journals Connector (OSTI)

Seven panelists, all simulation consultants, give their view of the future of simulation. There is some consistency in the views with four areas being mentioned by three of the panelists, and four areas being mentioned by two of the panelists. However, ...

Jerry Banks

2000-12-01T23:59:59.000Z

205

Radiation detector spectrum simulator  

DOE Patents [OSTI]

A small battery operated nuclear spectrum simulator having a noise source nerates pulses with a Gaussian distribution of amplitudes. A switched dc bias circuit cooperating therewith generates several nominal amplitudes of such pulses and a spectral distribution of pulses that closely simulates the spectrum produced by a radiation source such as Americium 241.

Wolf, Michael A. (Los Alamos, NM); Crowell, John M. (Los Alamos, NM)

1987-01-01T23:59:59.000Z

206

Radiation detector spectrum simulator  

DOE Patents [OSTI]

A small battery operated nuclear spectrum simulator having a noise source generates pulses with a Gaussian distribution of amplitudes. A switched dc bias circuit cooperating therewith to generate several nominal amplitudes of such pulses and a spectral distribution of pulses that closely simulates the spectrum produced by a radiation source such as Americium 241.

Wolf, M.A.; Crowell, J.M.

1985-04-09T23:59:59.000Z

207

Gaseous Hydrogen Delivery Breakout - Strategic Directions for...  

Broader source: Energy.gov (indexed) [DOE]

Gaseous Hydrogen Delivery Breakout - Strategic Directions for Hydrogen Delivery Workshop Gaseous Hydrogen Delivery Breakout - Strategic Directions for Hydrogen Delivery Workshop...

208

Simulations of pulsar wind formation  

E-Print Network [OSTI]

We present initial results of the first self-consistent numerical model of the outer magnetosphere of a pulsar. By using the relativistic ``particle-in-cell'' method with special boundary conditions to represent plasma dynamics in 3D, we are able to follow magnetospheric plasma through the light cylinder into the wind zone for arbitrary magnetic inclination angles. For aligned rotators we confirm the ``disk-dome'' charge-separated structure of the magnetosphere and find that this configuration is unstable to a 3D nonaxisymmetric diocotron instability. This instability allows plasma to move across the field lines and approach the corotating Goldreich-Julian solution within several rotation periods. For oblique rotators formation of the spiral ``striped wind'' in the equatorial direction is demonstrated and the acceleration of the wind and its magnetization is discussed. We find that the wind properties vary with stellar latitude; however, whether injection conditions at the pulsar are responsible for the observed jet-equator geometry of Crab and Vela is currently under investigation. We also comment on the electrodynamics of the simulated magnetospheres, their current closure, and future simulations.

Anatoly Spitkovsky; Jonathan Arons

2002-01-22T23:59:59.000Z

209

Simulation ensemble for a laserdriven shear experiment  

SciTech Connect (OSTI)

We perform an ensemble of simulations of a laser-driven shear experiment [L. Welser-Sherrill et al., Two laser-driven mix experiments to study reshock and shear, High Energy Density Phys. J. 9(3), 496499 (2013)] in the strong-shock high energy-density regime to better understand material mixing driven by the KelvinHelmholtz instability. Each simulation uses a different realization of random initial interface perturbations based on data from targets used in experiments. Validation of the simulations is based on direct comparison of simulation and radiographic data. Simulations are also compared with published direct numerical simulation and the theory of homogeneous isotropic turbulence. Despite the fact that the flow is neither homogeneous, isotropic, nor fully turbulent, there are local regions in which the flow demonstrates characteristics of homogeneous isotropic turbulence. Our analysis shows characteristics consistent with those of incompressible isotropic turbulence. Our results show that turbulent features are present both near the shock front and in a separated region in the wake of the shock. These features develop and decay at different rates. Finally, we use the ensemble of three-dimensional simulations to test the performance of two-dimensional Reynolds-averaged Navier-Stokes simulations. In this context, we also test a presumed probability density function turbulent mixing model extensively used in combustion applications.

Haines, Brian M.; Grinstein, Fernando F.; WelserSherrill, Leslie; Fincke, James R.; Doss, Forrest W. [Los Alamos National Laboratory, MS T087, Los Alamos, New Mexico 87545 (United States)] [Los Alamos National Laboratory, MS T087, Los Alamos, New Mexico 87545 (United States)

2013-09-15T23:59:59.000Z

210

Galaxies that Shine: radiation-hydrodynamical simulations of disk galaxies  

E-Print Network [OSTI]

Radiation feedback is typically implemented using subgrid recipes in hydrodynamical simulations of galaxies. Very little work has so far been performed using radiation-hydrodynamics (RHD), and there is no consensus on the importance of radiation feedback in galaxy evolution. We present RHD simulations of isolated galaxy disks of different masses with a resolution of 18 pc. Besides accounting for supernova feedback, our simulations are the first galaxy-scale simulations to include RHD treatments of photo-ionisation heating and radiation pressure, from both direct optical/UV radiation and multi-scattered, re-processed infrared (IR) radiation. Photo-heating smooths and thickens the disks and suppresses star formation about as much as the inclusion of ("thermal dump") supernova feedback does. These effects decrease with galaxy mass and are mainly due to the prevention of the formation of dense clouds, as opposed to their destruction. Radiation pressure, whether from direct or IR radiation, has little effect, but ...

Rosdahl, Joakim; Teyssier, Romain; Agertz, Oscar

2015-01-01T23:59:59.000Z

211

A consistent interface between PIC-simulations  

SciTech Connect (OSTI)

Many applications for PIC-simulations are limited by cpu-time, computer- memory or unphysical noise which is caused at large numbers of timesteps by the movement of particles. Therefore the aim is to divide the calculation area into different smaller parts to reduce the calculation time of each part. This subdivision requires a consistent, physical interface, which handles not only the particle properties but also the electromagnetic fields in the interface plane. Here we present an interface, implemented in a two dimensional (rz-geometry) and a three dimensional (xyz-geometry) PIC-code. The data stored during a two dimensional PIC-simulation can be reused for either another two dimensional or a three dimensional PIC-simulation. The following conditions, which have to be fulfilled at the interface plane, are checked during the simulation: the particle-movement through the plane has to be one-directional and the electromagnetic field of present resonances has to be negligible in the interface plane. We demonstrate the functionality of the interface for different cut-planes, applied to PIC-simulations of high-power tubes.

Becker, U.; Dohlus, M.; Weiland, T. [Technische Hochshule Darmstadt, Fachbereich 18, FG TEMF, Schlossgartenstr. 8, 64289 Darmstadt (Germany); Deutsches Elektronen Synchroton, DESY, Notkestrasse 85, D-22603 Hamburg (Germany); Technische Hochshule Darmstadt, Fachbereich 18, FG TEMF, Schlossgartenstr. 8, 64289 Darmstadt (Germany)

1997-02-01T23:59:59.000Z

212

A consistent interface between PIC-simulations  

SciTech Connect (OSTI)

Many applications for PIC-simulations are limited by cpu-time, computer- memory or unphysical noise which is caused at large numbers of timesteps by the movement of particles. Therefore the aim is to divide the calculation area into different smaller parts to reduce the calculation time of each part. This subdivision requires a consistent, physical interface, which handles not only the particle properties but also the electromagnetic fields in the interface plane. Here we present an interface, implemented in a two dimensional (rz-geometry) and a three dimensional (xyz-geometry) PIC-code. The data stored during a two dimensional PIC-simulation can be reused for either another two dimensional or a three dimensional PIC-simulation. The following conditions, which have to be fulfilled at the interface plane, are checked during the simulation: the particle-movement through the plane has to be one-directional and the electromagnetic field of present resonances has to be negligible in the interface plane. We demonstrate the functionality of the interface for different cut-planes, applied to PIC-simulations of high-power tubes. {copyright} {ital 1997 American Institute of Physics.}

Becker, U. [Technische Hochshule Darmstadt, Fachbereich 18, FG TEMF, Schlossgartenstr. 8, 64289 Darmstadt (Germany); Dohlus, M. [Deutsches Elektronen Synchroton, DESY, Notkestrasse 85, D-22603 Hamburg (Germany); Weiland, T. [Technische Hochshule Darmstadt, Fachbereich 18, FG TEMF, Schlossgartenstr. 8, 64289 Darmstadt (Germany)

1997-02-01T23:59:59.000Z

213

On spurious behavior of CFD simulations  

SciTech Connect (OSTI)

Spurious behavior in underresolved grids and/or semi-implicit temporal discretizations for four computational fluid dynamics (CFD) simulations are studied. The numerical simulations consist of (a) a 1-D chemically relaxed nonequilibrium model, (b) the direct numerical simulation (DNS) of 2-D incompressible flow over a backward facing step, (c) a loosely-coupled approach for a 2-D fluid-structure interaction, and (d) a 3-D compressible unsteady flow simulation of vortex breakdown in delta wings. Using knowledge from dynamical systems theory, various types of spurious behaviors that are numerical artifacts were systematically identified. These studies revealed the various possible dangers of misinterpreting numerical simulation of realistic complex flows that are constrained by the available computing power. In large scale computations underresolved grids, semi-implicit procedures, loosely-coupled implicit procedures, and insufficiently long time integration in DNS are most often unavoidable. Consequently, care must be taken in both computation and in interpretation of the numerical data. The results presented confirm the important role that dynamical systems theory can play in the understanding of the nonlinear behavior of numerical algorithms and in aiding the identification of the sources of numerical uncertainties in CFD.

Yee, H.C. [National Aeronautics and Space Administration, Moffett Field, CA (United States). Ames Research Center; Torczynski, J.R. [Sandia National Labs., Albuquerque, NM (United States); Morton, S.A.; Visbal, M.R. [Wright Lab., Wright-Patterson AFB, OH (United States); Sweby, P.K. [Univ. of Reading (United Kingdom)

1997-05-01T23:59:59.000Z

214

The AISI direct steelmaking program  

SciTech Connect (OSTI)

After six months of operation of the pilot plant, the viability of in-bath smelting combined with a high level of post combustion has been demonstrated, and the opportunity exists for an early commercialization of the direct ironmaking part of the process while we continue to research direct steelmaking. The program should be of equal interest to integrated and electric furnace producers. Smelting of ore provides virgin iron units. Additionally, the process has the flexibility of melting scrap and varying the ore-to-scrap ratio over wide ranges. This process does not require coke, thus eliminating the cokemaking operation, a major source of environmental concern.

Aukrust, E. (LTV Steel Co., Inc., Cleveland, OH (United States)); Downing, K.B. (Inland Steel Flat Products Co. (United States))

1991-01-01T23:59:59.000Z

215

Fast Generators of Direct Photons  

E-Print Network [OSTI]

Three fast generators of direct photons in the central rapidity region of high-energy heavy-ion collisions have been presented The generator of prompt photons is based on a tabulation of $p+p(\\bar p)$ data and binary scaling. Two generators of thermal direct photons, for hot hadron gas (HHG) and quark-gluon plasma (QGP) scenarios, assume the 1+1 Bjorken hydrodynamics. SPS and RHIC data can be fitted better by scenario with QGP. Predictions for the LHC energy have been made. The generators have been realized as macros for the ROOT analysis package.

S. M. Kiselev

2008-11-17T23:59:59.000Z

216

Directed lines in sparse potentials  

Science Journals Connector (OSTI)

We present a continuum formulation of a (d+1)-dimensional directed line interacting with sparse potentials (i.e., d-dimensional potentials defined only at discrete longitudinal locations.) An iterative solution for the partition function is derived. The impulsive influence of the potentials induces discontinuities in the evolution of the probability density P(x,t) of the directed line. The effects of these discontinuities are studied in detail for the simple case of a single defect. We then investigate sparse columnar potentials defined as a periodic array of defects in (2+1) dimensions, and solve exactly for P. A nontrivial binding-unbinding transition is found.

T. J. Newman and A. J. McKane

1997-01-01T23:59:59.000Z

217

Computing Stuttering Simulations  

Science Journals Connector (OSTI)

Stuttering bisimulation is a well-known behavioural equivalence ... the next-time operator X. Correspondingly, the stuttering simulation preorder induces a coarser behavioural equivalence ... -time X and globally...

Francesco Ranzato; Francesco Tapparo

2009-01-01T23:59:59.000Z

218

BISEN: Biochemical Simulation Environment  

Science Journals Connector (OSTI)

......how to use MATLAB to generate...265 lines of MATLAB code compute...networks. In Chemical Biophysics...of Cellular Processes. (2008...Supplementary Data 1 - pdf file BISEN: Biochemical Simulation Environment...systems in the MATLAB computing......

J. Vanlier; F. Wu; F. Qi; K. C. Vinnakota; Y. Han; R. K. Dash; F. Yang; D. A. Beard

2009-03-15T23:59:59.000Z

219

Modeling & Simulation publications  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Modeling & Simulation » Modeling & Simulation » Modeling & Simulation Publications Modeling & Simulation publications Research into alternative forms of energy, especially energy security, is one of the major national security imperatives of this century. Get Expertise David Harradine Physical Chemistry and Applied Spectroscopy Email Josh Smith Chemistry Email The inherent knowledge of transformation has beguiled sorcerers and scientists alike. D.A. Horner, F. Lambert, J.D. Kress, and L.A. Collins, "Transport properties of lithium hydride from quantum molecular dynamics and orbital-free molecular dynamics," Physical Review B - Condensed Matter and Materials Physics 80(2) (2009). J.D. Kress, D.A. Horner, and L.A. Collins, "Mixing rules for optical and transport properties of warm, dense matter," AIP Conference Proceedings 1195, 931-934 (2009).

220

Applied large eddy simulation  

Science Journals Connector (OSTI)

...2971-2983. doi:10.1098/rsta.2008.0303 . Audio Supplement Audio Supplement Audio files from the Applied large eddy simulation...fidelity. | Whittle Laboratory, Department of Engineering, University of Cambridge, Cambridge CB2 1PZ...

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

A restructurable logic simulator  

E-Print Network [OSTI]

elements were strictly binary and time was uniformly quantized. Interconnection information was used to confine simulation effort to active portions of the )ogic network. Delay was modeled with an event scheduling scheme, where logic state transitions... I7. g). Logic )evels become voltages and state transitions become transient responses. The circuit simulators include the effects of numerous parameters in their device models, and then generate their answers by numerically solving systems...

Ledford, Gordon Lee

2012-06-07T23:59:59.000Z

222

Laser Direct Drive: Scientific Advances,  

E-Print Network [OSTI]

· Simpler targets & physics · Predict Fusion Class Gains (> 140) at lower laser energy (500 kJ - 1 MJ) #12;7 KrF lasers have advantages for fusion energy PHYSICS Deeper UV (248 nm vs 351 for glass): -- Greater · chamber #12;9 Gain for Fusion Energy New Direct Drive Designs: Power plant class gains, much smaller laser

223

Direct from CDC Environmental Health  

E-Print Network [OSTI]

environmental health services (i.e., services involving water quality, air quality, waste management, or vector management plans of water supply systems. The team also works on sustainability evalu ation and sanitationDirect from CDC Environmental Health Services Branch Editor's note: NEHA strives to provide up

224

Bulk Hydrogen Strategic Directions for  

E-Print Network [OSTI]

Bulk Hydrogen Storage Strategic Directions for Hydrogen Delivery Workshop May 7-8, 2003 Crystal City, Virginia #12;Breakout Session - Bulk Hydrogen Storage Main Themes/Caveats Bulk Storage = Anything storage is an economic solution to address supply/demand imbalance #12;Breakout Session - Bulk Hydrogen

225

DOE Directives, Delegations, and Requirements  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

use of nuclear explosives. 2015-01-29T17:37:07Z News Item NEW - DOE O 422.1 Admin Chg 2, Conduct of Operations https:www.directives.doe.govnewsnew-doe-o-422.1-admin-chg-2 The...

226

Some Aspects of Simulator Design  

Science Journals Connector (OSTI)

...Article Some Aspects of Simulator Design J. M. Dempsey Panellit Ltd., Borehamwood, UK Certain aspects of simulator design are considered with particular reference to the Elliott Nuclear Power......

J. M. Dempsey

1960-01-01T23:59:59.000Z

227

Computer simulation | Open Energy Information  

Open Energy Info (EERE)

simulation Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Computer simulation Author wikipedia Published wikipedia, 2013 DOI Not Provided Check for...

228

Dynamic Performance Study on the Solar Collector/Evaporator of Direct Expansion Solar Assisted Heat Pump Systems  

Science Journals Connector (OSTI)

A dynamic simulation model is developed for predicting performance of the solar collector/evaporator of direct expansion solar assisted heat pump systems. In this model, ... meteorological and configuration param...

Li Hong; Yang Hongxing

2009-01-01T23:59:59.000Z

229

Particle?in?cell simulation of spherical plasma focus diode  

Science Journals Connector (OSTI)

A self?magnetically insulated three?dimensionally focused ion?beam diode spherical plasma focusdiode (SPFD) is studied by numerical simulation using a two?dimensional electromagnetic relativistic particle?in?cell computer code. The calculated results of the diode impedance the ion?current efficiency and the focusing characteristics of the ion beam are presented. These results except the data of the ion?beam current are in good agreement with the experimental results. Since the major ion deflection direction observed experimentally is also obtained in the simulation it is attempted to optimize the SPFD by correcting the ion deflection with the shape of the diode gap by means of simulations.

W. Jiang; T. Sakagami; K. Masugata; K. Yatsui

1995-01-01T23:59:59.000Z

230

Teaching Direct Marketing and Small Farm Viability: Resources for Instructors - Unit 5, Other Direct Marketing Options  

E-Print Network [OSTI]

topics related to innovative direct marketing opportunities,including direct marketing to restaurants.6 | Unit 5.5 Direct Marketing to Restaurants Resources

Miles, Albie; Brown, Martha

2005-01-01T23:59:59.000Z

231

Safety and Security Directives Reform  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Reforming a "Mountain" of Policy Reforming a "Mountain" of Policy Beginning with his confirmation hearings in January 2009, Energy Secretary Steven Chu challenged the Department of Energy to take a fresh look at how we conduct business. This challenge provided the opportunity for DOE to put in place the most effective and efficient strategies to accomplish the Department's missions safely and securely. In response to the Secretary's challenge and building on the results of Deputy Secretary Poneman's Safety and Security Reform studies, the Office of Health, Safety and Security (HSS) broadened its directives review activities during 2009. By November 2009 HSS had initiated a disciplined review of all health, safety, and security directives, which included a systematic review of the Department's safety and security regulatory model.

232

wind direction | OpenEI  

Open Energy Info (EERE)

direction direction Dataset Summary Description Freedom Field is a not-for-profit organization formed to facilitate development and commercialization of renewable energy solutions. The organization has installed a variety of renewable energy generating technologies at their facility (located at Rock River Water Reclamation in Rockford, IL), with the intention of serving as a demonstration facility. The facility monitors data (at 5-minute intervals) from a weather station, 12.4 kW of PV panels (56 220-watt panels), a 10kW wind turbine (HAWT), a 1.2 kW wind turbine (VAWT), an absorption cooling system, and biogas burners. Source Freedom Field Date Released July 19th, 2011 (3 years ago) Date Updated Unknown Keywords biogas monitoring data PV radiance solar temperature

233

carbon sequestration via direct injection  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SEQUESTRATION VIA DIRECT INJECTION SEQUESTRATION VIA DIRECT INJECTION Howard J. Herzog, Ken Caldeira, and Eric Adams INTRODUCTION The build-up of carbon dioxide (CO 2 ) and other greenhouse gases in the Earth's atmosphere has caused concern about possible global climate change. As a result, international negotiations have produced the Framework Convention on Climate Change (FCCC), completed during the 1992 Earth Summit in Rio de Janeiro. The treaty, which the United States has ratified, calls for the "stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system." The primary greenhouse gas is CO 2 , which is estimated to contribute to over two-thirds of any climate change. The primary source of CO

234

Ultra-wideband directional sampler  

DOE Patents [OSTI]

The Ultra-Wideband (UWB) Directional Sampler is a four port device that combines the function of a directional coupler with a high speed sampler. Two of the four ports operate at a high sub-nanosecond speed, in "real time", and the other two ports operate at a slow millisecond-speed, in "equivalent time". A signal flowing inbound to either of the high speed ports is sampled and coupled, in equivalent time, to the adjacent equivalent time port while being isolated from the opposite equivalent time port. A primary application is for a time domain reflectometry (TDR) situation where the reflected pulse returns while the outbound pulse is still being transmitted, such as when the reflecting discontinuity is very close to the TDR apparatus.

McEwan, Thomas E. (Livermore, CA)

1996-01-01T23:59:59.000Z

235

OM300 Direction Drilling Module  

SciTech Connect (OSTI)

OM300 Geothermal Direction Drilling Navigation Tool: Design and produce a prototype directional drilling navigation tool capable of high temperature operation in geothermal drilling Accuracies of 0.1 Inclination and Tool Face, 0.5 Azimuth Environmental Ruggedness typical of existing oil/gas drilling Multiple Selectable Sensor Ranges High accuracy for navigation, low bandwidth High G-range & bandwidth for Stick-Slip and Chirp detection Selectable serial data communications Reduce cost of drilling in high temperature Geothermal reservoirs Innovative aspects of project Honeywell MEMS* Vibrating Beam Accelerometers (VBA) APS Flux-gate Magnetometers Honeywell Silicon-On-Insulator (SOI) High-temperature electronics Rugged High-temperature capable package and assembly process

MacGugan, Doug

2013-08-22T23:59:59.000Z

236

Ultra-wideband directional sampler  

DOE Patents [OSTI]

The Ultra-Wideband (UWB) Directional Sampler is a four port device that combines the function of a directional coupler with a high speed sampler. Two of the four ports operate at a high sub-nanosecond speed, in ``real time``, and the other two ports operate at a slow millisecond-speed, in ``equivalent time``. A signal flowing inbound to either of the high speed ports is sampled and coupled, in equivalent time, to the adjacent equivalent time port while being isolated from the opposite equivalent time port. A primary application is for a time domain reflectometry (TDR) situation where the reflected pulse returns while the outbound pulse is still being transmitted, such as when the reflecting discontinuity is very close to the TDR apparatus. 3 figs.

McEwan, T.E.

1996-05-14T23:59:59.000Z

237

Digital Surveying Directional Surveying Specialists | Open Energy  

Open Energy Info (EERE)

Digital Surveying Directional Surveying Specialists Digital Surveying Directional Surveying Specialists Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Digital Surveying Directional Surveying Specialists Author Directional Surveying Specialists Published Publisher Not Provided, 2012 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Digital Surveying Directional Surveying Specialists Citation Directional Surveying Specialists. Digital Surveying Directional Surveying Specialists [Internet]. 2012. [cited 2013/10/08]. Available from: http://www.digitalsurveying.co.za/services/geophysical-borehole-surveying/overview/optical-televiewer/ Retrieved from "http://en.openei.org/w/index.php?title=Digital_Surveying_Directional_Surveying_Specialists&oldid=690244"

238

ARM - Measurement - Shortwave narrowband direct normal irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Measurement : Shortwave narrowband direct normal irradiance The rate at which radiant energy in narrow bands of wavelengths shorter than approximately 4mum, that comes directly...

239

Liquid Hydrogen Delivery - Strategic Directions for Hydrogen...  

Broader source: Energy.gov (indexed) [DOE]

Liquid Hydrogen Delivery - Strategic Directions for Hydrogen Delivery Workshop Liquid Hydrogen Delivery - Strategic Directions for Hydrogen Delivery Workshop Targets, barriers and...

240

Geothermal Direct Use | Open Energy Information  

Open Energy Info (EERE)

Direct Use Direct Use Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF [edit] Geothermal Direct Use Geothermal Technologies There are many types of Geothermal Technologies that take advantage of the earth's heat: Hydrothermal Systems Enhanced Geothermal Systems (EGS) Sedimentary Geothermal Systems Co-Produced Geothermal Systems Geothermal Direct Use Ground Source Heat Pumps Direct Use Links Related documents and websites EERE's Direct Use Report National Institute of Building Science's Whole Building Design Guide Policy Makers' Guidebook for Geothermal Heating and Cooling Dictionary.png Geothermal Direct Use: Low- to moderate-temperature water from geothermal reservoirs can be used to provide heat directly to buildings, or other applications that require

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Directly correlated transmission electron microscopy and atom...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Directly correlated transmission electron microscopy and atom probe tomography of grain boundary oxidation in a Ni-Al binary Directly correlated transmission electron microscopy...

242

Direct search for dark matter  

SciTech Connect (OSTI)

Dark matter is hypothetical matter which does not interact with electromagnetic radiation. The existence of dark matter is only inferred from gravitational effects of astrophysical observations to explain the missing mass component of the Universe. Weakly Interacting Massive Particles are currently the most popular candidate to explain the missing mass component. I review the current status of experimental searches of dark matter through direct detection using terrestrial detectors.

Yoo, Jonghee; /Fermilab

2009-12-01T23:59:59.000Z

243

Nuclear quantum effects in liquid water from path-integral simulations using an ab initio force matching approach  

E-Print Network [OSTI]

We have applied path integral simulations, in combination with new ab initio based water potentials, to investigate nuclear quantum effects in liquid water. Because direct ab initio path integral simulations are computationally expensive, a flexible water model is parameterized by force-matching to density functional theory-based molecular dynamics simulations. The resulting effective potentials provide an inexpensive replacement for direct ab inito molecular dynamics simulations and allow efficient simulation of nuclear quantum effects. Static and dynamic properties of liquid water at ambient conditions are presented and the role of nuclear quantum effects, exchange-correlation functionals and dispersion corrections are discussed in regards to reproducing the experimental properties of liquid water.

Thomas Spura; Christopher John; Scott Habershon; Thomas D. Khne

2014-02-06T23:59:59.000Z

244

Direct Carbon Fuel Cell Workshop  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct Carbon Fuel Cell Workshop Direct Carbon Fuel Cell Workshop July 30, 2003 Table of Contents Disclaimer Papers and Presentations Carbon Anode Electrochemistry Carbon Conversion Fuel Cells Coal Preprocessing Prior to Introduction Into the Fuel Cell Potential Market Applications for Direct Carbon Fuel Cells Discussion of Key R&D Needs Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government or any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

245

Wellbore inertial directional surveying system  

DOE Patents [OSTI]

A wellbore inertial directional surveying system for providing a complete directional survey of an oil or gas well borehole to determine the displacement in all three directions of the borehole path relative to the well head at the surface. The information generated by the present invention is especially useful when numerous wells are drilled to different geographical targets from a single off-shore platform. Accurate knowledge of the path of the borehole allows proper well spacing and provides assurance that target formations are reached. The tool is lowered down into a borehole on the electrical cable. A computer positioned on the surface communicates with the tool via the cable. The tool contains a sensor block which is supported on a single gimbal, the rotation axis of which is aligned with the cylinder axis of the tool and, correspondingly, the borehole. The gyroscope measurement of the sensor block rotation is used in a null-seeking servo loop which essentially prevents rotation of the sensor block aboutthe gimbal axis. Angular rates of the sensor block about axes which are perpendicular to the gimbal axis are measured by gyroscopes in a manner similar to a strapped-down arrangement. Three accelerometers provide acceleration information as the tool is lowered within the borehole. The uphole computer derives position information based upon acceleration information and anular rate information. Kalman estimation techniques are used to compensate for system errors.

Andreas, Ronald D. (Albuquerque, NM); Heck, G. Michael (Albuquerque, NM); Kohler, Stewart M. (Albuquerque, NM); Watts, Alfred C. (Albuquerque, NM)

1991-01-01T23:59:59.000Z

246

Wellbore inertial directional surveying system  

DOE Patents [OSTI]

A wellbore inertial directional surveying system for providing a complete directional survey of an oil or gas well borehole to determine the displacement in all three directions of the borehole path relative to the well head at the surface. The information generated by the present invention is especially useful when numerous wells are drilled to different geographical targets from a single offshore platform. Accurate knowledge of the path of the borehole allows proper well spacing and provides assurance that target formations are reached. The tool is lowered down into a borehole on an electrical cable. A computer positioned on the surface communicates with the tool via the cable. The tool contains a sensor block which is supported on a single gimbal, the rotation axis of which is aligned with the cylinder axis of the tool and, correspondingly, the borehole. The gyroscope measurement of the sensor block rotation is used in a null-seeking servo loop which essentially prevents rotation of the sensor block about the gimbal axis. Angular rates of the sensor block about axes which are perpendicular to te gimbal axis are measured by gyroscopes in a manner similar to a strapped-down arrangement. Three accelerometers provide acceleration information as the tool is lowered within the borehole. The uphole computer derives position information based upon acceleration information and angular rate information. Kalman estimation techniques are used to compensate for system errors. 25 figures.

Andreas, R.D.; Heck, G.M.; Kohler, S.M.; Watts, A.C.

1982-09-08T23:59:59.000Z

247

Advanced Simulation Capability for  

Broader source: Energy.gov (indexed) [DOE]

Simulation Capability for Simulation Capability for Environmental Management (ASCEM) ASCEM is being developed to provide a tool and approach to facilitate robust and standardized development of perfor- mance and risk assessments for cleanup and closure activi- ties throughout the EM complex. The ASCEM team is composed of scientists from eight National Laboratories. This team is leveraging Department of Energy (DOE) investments in basic science and applied research including high performance computing codes developed through the Advanced Scientific Computing Research and Advanced Simulation & Computing pro- grams as well as collaborating with the Offices of Science, Fossil Energy, and Nuclear Energy. Challenge Current groundwater and soil remediation challenges that will continue to be addressed in the next decade include

248

Simulation of LMFBR  

SciTech Connect (OSTI)

The title of this session is taken to imply the system-wide thermohydraulic simulation of liquid metal fast breeder reactors (LMFBR). One is interested in predicting the temperatures, pressures, and the coolant flow rates throughout the entire plant including the reactor core, the primary and secondary sodium heat transport circuits, the steam generating system as well as other auxiliary circuits. Such a simulation is needed for (1) scoping studies (i.e., in the pre-design phase of a plant), (2) detailed design development, (3) the safety analysis (post-design development phase), and (4) the operator training and plant operation. This session emphasizes the simulation of LMFBRs for only two key categories of transients: operational disturbances or events and the post-shutdown heat removal.

Agrawal, A.K.

1982-01-01T23:59:59.000Z

249

Computing Stuttering Simulations  

E-Print Network [OSTI]

Stuttering bisimulation is a well-known behavioral equivalence that preserves CTL-X, namely CTL without the next-time operator X. Correspondingly, the stuttering simulation preorder induces a coarser behavioral equivalence that preserves the existential fragment ECTL-{X,G}, namely ECTL without the next-time X and globally G operators. While stuttering bisimulation equivalence can be computed by the well-known Groote and Vaandrager's [1990] algorithm, to the best of our knowledge, no algorithm for computing the stuttering simulation preorder and equivalence is available. This paper presents such an algorithm for finite state systems.

Ranzato, Francesco

2009-01-01T23:59:59.000Z

250

Advanced Simulation and Computing  

National Nuclear Security Administration (NNSA)

NA-ASC-117R-09-Vol.1-Rev.0 NA-ASC-117R-09-Vol.1-Rev.0 Advanced Simulation and Computing PROGRAM PLAN FY09 October 2008 ASC Focal Point Robert Meisner, Director DOE/NNSA NA-121.2 202-586-0908 Program Plan Focal Point for NA-121.2 Njema Frazier DOE/NNSA NA-121.2 202-586-5789 A Publication of the Office of Advanced Simulation & Computing, NNSA Defense Programs i Contents Executive Summary ----------------------------------------------------------------------------------------------- 1 I. Introduction -------------------------------------------------------------------------------------------------------- 2 Realizing the Vision ------------------------------------------------------------------------------------------------- 2 The Future of the Nuclear Weapons Complex ---------------------------------------------------------------- 2

251

Modeling and Simulation of HVAC Faulty Operations and Performance Degradation due to Maintenance Issues  

E-Print Network [OSTI]

offset Control sensors such as supply air temperature (SAT)a designed supply air temperature to control is 13?C, theSupply air temperature sensor (SAT) offset Impacts Simulated Scenarios Direct modeling, adjust SAT setpoint controls,

Wang, Liping

2014-01-01T23:59:59.000Z

252

Asymmetric directly driven capsule implosions: Modeling and experiments-A requirement for the National Ignition Facility  

SciTech Connect (OSTI)

Direct-drive experiments at the University of Rochester's OMEGA laser [T. R. Boehly, R. L. McCrory, C. P. Verdon et al., Fusion Eng. Des. 44, 35 (1999)] have been performed to prototype eventual campaigns on the National Ignition Facility (NIF) [E. I. Moses and C. R. Wuest, Fusion Sci. Technol. 43, 420 (2003)] to investigate the mixing of target materials. Spherical-implosion targets with equatorial defects have been irradiated with polar direct drive, a requirement for direct-drive experiments at NIF. The physics question addressed by these results is whether simulations can match data on 0th-order hydrodynamics and implosion symmetry, the most basic implosion features, with and without the defect. The successful testing of hydrodynamic simulations leads to better designs for experiments and guides accurate planning for polar-direct-drive-ignition studies on the NIF platform.

Cobble, J. A.; Murphy, T. J.; Schmitt, M. J.; Bradley, P. A.; Krashenninikova, N. S.; Obrey, K. A.; Hsu, S. C.; Tregillis, I. L.; Magelssen, G. R.; Wysocki, F. J.; Batha, S. H. [Los Alamos National Laboratory, Mail Stop E527, Los Alamos, New Mexico 87545 (United States)

2012-12-15T23:59:59.000Z

253

Enabling Green Energy and Propulsion Systems via Direct Noise Computation |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

High-fidelity simulation of exhaust nozzle under installed configuration High-fidelity simulation of exhaust nozzle under installed configuration Umesh Paliath, GE Global Research; Joe Insley, Argonne National Laboratory Enabling Green Energy and Propulsion Systems via Direct Noise Computation PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: GE Global Research Allocation Program: INCITE Allocation Hours at ALCF: 105 Million Year: 2013 Research Domain: Engineering GE Global Research is using the Argonne Leadership Computing Facility (ALCF) to deliver significant improvements in efficiency, (renewable's) yield and lower emissions (noise) for advanced energy and propulsion systems. Understanding the fundamental physics of turbulent mixing has the potential to transform product design for components such as airfoils and

254

Visualizing Gyrokinetic Simulations  

Science Journals Connector (OSTI)

The continuing advancement of plasma science is central to realizing fusion as an inexpensive and safe energy source. Gryokinetic simulations of plasmas are fundamental to the understanding of turbulent transport in fusion plasma. This paper discusses ... Keywords: graphics hardware, non-rectilinear mesh, plasma physics, scientific visualization, texture methods, volume visualization

David Crawford; Kwan-Liu Ma; Min-Yu Huang; Scott Klasky; Stephane Ethier

2004-10-01T23:59:59.000Z

255

Introduction. Biomolecular simulation  

Science Journals Connector (OSTI)

...Chemical bonding is a quantum mechanical phenomenon...account the essential quantum mechanics (QM) are...enzyme reaction involves quantum tunnelling, an area...simulation promises in future to provide exciting new...machines such as biological motors and pumps. This themed...

2008-01-01T23:59:59.000Z

256

ClimateSimulation Biogeochemistry  

E-Print Network [OSTI]

to sequester further CO2 emissions. Chlorophyll concentration from an eddy-resolving POP simulation with full ability of the ocean to sequester further CO2 emissions. Chlorophyll concentration from an eddy release and the future ability of the ocean to sequester further CO2 emissions. Chlorophyll concentration

257

Air Breathing Direct Methanol Fuel Cell  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Air Breathing Direct Methanol Fuel Cell Air Breathing Direct Methanol Fuel Cell Air Breathing Direct Methanol Fuel Cell An air breathing direct methanol fuel cell is provided with a membrane electrode assembly, a conductive anode assembly that is permeable to air and directly open to atmospheric air, and a conductive cathode assembly that is permeable to methanol and directly contacting a liquid methanol source. Available for thumbnail of Feynman Center (505) 665-9090 Email Air Breathing Direct Methanol Fuel Cell An air breathing direct methanol fuel cell is provided with a membrane electrode assembly, a conductive anode assembly that is permeable to air and directly open to atmospheric air, and a conductive cathode assembly that is permeable to methanol and directly contacting a liquid methanol

258

Direct connection of series self-excited generators and HVDC converters  

SciTech Connect (OSTI)

An alternative and simpler solution is proposed for the direct connection of generators to HVdc converters. The generator exciter windings are connected in series with the output of the HVdc converter and take the place of the conventional smoothing reactor. Existing steady state and time domain simulation programs are modified to represent the behavior of the series direct connection scheme. It is shown that series excitation extends naturally the power transmission capability and permits fast fault clearances.

Arrillaga, J.; Macdonald, S.J.; Watson, N.R.; Watson, S. (Univ. Canterbury, Christchurch (New Zealand))

1993-10-01T23:59:59.000Z

259

Staged direct injection diesel engine  

DOE Patents [OSTI]

A diesel engine having staged injection for using lower cetane number fuels than No. 2 diesel fuel. The engine includes a main fuel injector and a pilot fuel injector. Pilot and main fuel may be the same fuel. The pilot injector injects from five to fifteen percent of the total fuel at timings from 20.degree. to 180.degree. BTDC depending upon the quantity of pilot fuel injected, the fuel cetane number and speed and load. The pilot fuel injector is directed toward the centerline of the diesel cylinder and at an angle toward the top of the piston, avoiding the walls of the cylinder. Stratification of the early injected pilot fuel is needed to reduce the fuel-air mixing rate, prevent loss of pilot fuel to quench zones, and keep the fuel-air mixture from becoming too fuel lean to become effective. In one embodiment, the pilot fuel injector includes a single hole for injection of the fuel and is directed at approximately 48.degree. below the head of the cylinder.

Baker, Quentin A. (San Antonio, TX)

1985-01-01T23:59:59.000Z

260

DISCRETE EVENT SIMULATION OF OPTICAL SWITCH MATRIX PERFORMANCE IN COMPUTER NETWORKS  

SciTech Connect (OSTI)

In this paper, we present application of a Discrete Event Simulator (DES) for performance modeling of optical switching devices in computer networks. Network simulators are valuable tools in situations where one cannot investigate the system directly. This situation may arise if the system under study does not exist yet or the cost of studying the system directly is prohibitive. Most available network simulators are based on the paradigm of discrete-event-based simulation. As computer networks become increasingly larger and more complex, sophisticated DES tool chains have become available for both commercial and academic research. Some well-known simulators are NS2, NS3, OPNET, and OMNEST. For this research, we have applied OMNEST for the purpose of simulating multi-wavelength performance of optical switch matrices in computer interconnection networks. Our results suggest that the application of DES to computer interconnection networks provides valuable insight in device performance and aids in topology and system optimization.

Imam, Neena [ORNL; Poole, Stephen W [ORNL

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Honduras from SUNY Honduras from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

262

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Nicaragua from SUNY Nicaragua from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

263

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Guatemala from SUNY Guatemala from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

264

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Cuba sites from SUNY Cuba sites from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

265

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

El Salvador sites from SUNY El Salvador sites from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

266

Using sensitivity derivatives for design and parameter estimation in an atmospheric plasma discharge simulation  

Science Journals Connector (OSTI)

The problem of applying sensitivity analysis to a one-dimensional atmospheric radio frequency plasma discharge simulation is considered. A fluid simulation is used to model an atmospheric pressure radio frequency helium discharge with a small nitrogen ... Keywords: Adjoint, Direct differentiation, Optimization, Plasma discharge, Sensitivity analysis, Uncertainty analysis

Kyle J. Lange; W. Kyle Anderson

2010-08-01T23:59:59.000Z

267

Modeling and Simulation of Advanced Nano-Scale Very Large Scale Integration Circuits  

E-Print Network [OSTI]

is one level beyond simulation and modeling to directly optimize design, but is also built upon accurate simulations and modeling. Two simple, yet efficient, buffering and gate sizing techniques are presented. On 20 industrial designs in 45nm and 65nm...

Zhou, Ying

2010-07-14T23:59:59.000Z

268

Comparing Membrane Simulations to Scattering Experiments: Introducing the SIMtoEXP Software  

E-Print Network [OSTI]

of biomembrane simulations with experimental X-ray and neutron scattering data. It has the following features: (1 the electron density e(z) and neutron scattering length density m(z) profiles along the z direction (i.e., nor simulation Á X-ray scattering Á Neutron scattering Á Computer software Introduction It is well recognized

Nagle, John F.

269

Psychologie Franaise (2000), 45, 4, 295-306. Pour une thorie "motrice" de la simulation  

E-Print Network [OSTI]

1 Psychologie Française (2000), 45, 4, 295-306. Pour une théorie "motrice" de la simulation Joëlle-circuit", d'une manière qui n'engage pas directement une réponse motrice ; mais la simulation exploite les

Paris-Sud XI, Université de

270

Title of dissertation: QUANTUM SIMULATIONS OF THE ISING MODEL WITH TRAPPED IONS  

E-Print Network [OSTI]

are intractable. #12;QUANTUM SIMULATIONS OF THE ISING MODEL WITH TRAPPED IONS: DEVIL'S STAIRCASE AND ARBITRARYABSTRACT Title of dissertation: QUANTUM SIMULATIONS OF THE ISING MODEL WITH TRAPPED IONS: DEVIL'S STAIRCASE AND ARBITRARY LATTICE PROPOSAL Simcha Korenblit, Doctor of Philosophy 2013 Dissertation directed

Monroe, Christopher

271

Simulation standards: a framework for standard modular simulation  

Science Journals Connector (OSTI)

The primary reason for building manufacturing simulations is to provide support tools that aid the manufacturing decision-making process. Simulations are typically a part of a case study commissioned by manufacturing management to address a particular ...

Charles McLean; Swee Leong

2002-12-01T23:59:59.000Z

272

Simulation for ARPI and the Air Campaign Simulator Scott Anderson  

E-Print Network [OSTI]

' #12;Simulation for ARPI and the Air Campaign Simulator Paul Cohen Scott Anderson David Westbrook will be satis ed, and so forth. Nevertheless, such evaluation is critical to a sci- enti c understanding of how

Southern California, University of

273

Risk Analysis and Simulation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Analysis and Simulation Analysis and Simulation for Geologic Storage of CO 2 BEST PRACTICES for: 2013 Revised Edition Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The

274

PEBBLES Mechanics Simulation Speedup  

SciTech Connect (OSTI)

Pebble bed reactors contain large numbers of spherical fuel elements arranged randomly. Determining the motion and location of these fuel elements is required for calculating certain parameters of pebble bed reactor operation. These simulations involve hundreds of thousands of pebbles and involve determining the entire core motion as pebbles are recirculated. Single processor algorithms for this are insufficient since they would take decades to centuries of wall-clock time. This paper describes the process of parallelizing and speeding up the PEBBLES pebble mechanics simulation code. Both shared memory programming with the Open Multi-Processing API and distributed memory programming with the Message Passing Interface API are used in simultaneously in this process. A new shared memory lock-less linear time collision detection algorithm is described. This method allows faster detection of pebbles in contact than generic methods. These combine to make full recirculations on AVR sized reactors possible in months of wall clock time.

Joshua J. Cogliati; Abderrafi M. Ougouag

2010-05-01T23:59:59.000Z

275

The Simulation Intranet Architecture  

SciTech Connect (OSTI)

The Simdarion Infranet (S1) is a term which is being used to dcscribc one element of a multidisciplinary distributed and distance computing initiative known as DisCom2 at Sandia National Laboratory (http ct al. 1998). The Simulation Intranet is an architecture for satisfying Sandia's long term goal of providing an end- to-end set of scrviccs for high fidelity full physics simu- lations in a high performance, distributed, and distance computing environment. The Intranet Architecture group was formed to apply current distributed object technologies to this problcm. For the hardware architec- tures and software models involved with the current simulation process, a CORBA-based architecture is best suited to meet Sandia's needs. This paper presents the initial desi-a and implementation of this Intranct based on a three-tier Network Computing Architecture(NCA). The major parts of the architecture include: the Web Cli- ent, the Business Objects, and Data Persistence.

Holmes, V.P.; Linebarger, J.M.; Miller, D.J.; Vandewart, R.L.

1998-12-02T23:59:59.000Z

276

direct normal | OpenEI  

Open Energy Info (EERE)

normal normal Dataset Summary Description (Abstract): A map depicting model estimates of monthly average daily total radiation using inputs derived from satellite and surface observations of cloud cover, aerosol optical depth, precipitable water vapor, albedo, atmospheric pressure and ozone sampled at a 40km resolution. (Purpose): A visual depiction of solar energy resource for concentrating solar power systems. Source NREL Date Released December 11th, 2003 (10 years ago) Date Updated October 30th, 2007 (7 years ago) Keywords Central America direct normal DNI map NREL solar SWERA UNEP Data application/pdf icon Download Map (pdf, 67.1 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period License License Other or unspecified, see optional comment below

277

Formatting paragraph numbering for directives  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

MEASUREMENT SENSITIVE DOE G 440.1-8 12-27-06 IMPLEMENTATION GUIDE for use with 10 CFR PART 851 WORKER SAFETY AND HEALTH PROGRAM [This Guide describes suggested nonmandatory approaches for meeting requirements. Guides are not requirements documents and are not construed as requirements in any audit or appraisal for compliance with the parent Policy, Order, Notice, or Manual.] U.S. Department of Energy Washington, D.C. 20585 AVAILABLE ONLINE AT: INITIATED BY: www.directives.doe.gov Office of Health, Safety and Security DOE G 440.1-8 i (and ii) 12-27-06 FOREWORD This Department of Energy (DOE) Guide is available for use by all DOE components and their contractors. Beneficial comments (recommendations, additions, and deletions) and pertinent data that may

278

Direct synthesis of calcium borohydride  

DOE Patents [OSTI]

A method is disclosed for directly preparing an alkaline earth metal borohydride, i.e. Ca(BH.sub.4).sub.2, from the alkaline earth metal hydride and the alkaline earth metal boride. The borohydride thus prepared is doped with a small portion of a metal chloride catalyst compound, such as RuCl.sub.3, TiCl.sub.3, or a mixture of TiCl.sub.3 and palladium metal. The process provides for mechanically mixing the dry reagents under an inert atmosphere followed by charging the mixed materials with high pressure hydrogen at about 70 MPa while heating the mixture to about 400.degree. C. The method is relatively simple and inexpensive and provides reversible hydride compounds which are free of the usual contamination introduced by prior art wet chemical methods.

Ronnebro, Ewa Carin Ellinor (Dublin, CA); Majzoub, Eric H. (Pleasanton, CA)

2009-10-27T23:59:59.000Z

279

Direct synthesis of magnesium borohydride  

DOE Patents [OSTI]

A method is disclosed for directly preparing an alkaline earth metal borohydride, i.e. Mg(BH.sub.4).sub.2, from the alkaline earth metal boride MgB.sub.2 by hydrogenating the MgB.sub.2 at an elevated temperature and pressure. The boride may also be doped with small amounts of a metal chloride catalyst such as TiCl.sub.3 and/or NiCl.sub.2. The process provides for charging MgB.sub.2 with high pressure hydrogen above at least 70 MPa while simultaneously heating the material to about 350.degree. C. to about 400.degree. C. The method is relatively simple and inexpensive and provides a reversible hydride compound having a hydrogen capacity of at least 11 wt %.

Ronnebro, Ewa Carin Ellinor (Kennewick, WA); Severa, Godwin (Honolulu, HI); Jensen, Craig M. (Kailua, HI)

2012-04-03T23:59:59.000Z

280

Laboratory directed research and development  

SciTech Connect (OSTI)

The purposes of Argonne's Laboratory Directed Research and Development (LDRD) Program are to encourage the development of novel concepts, enhance the Laboratory's R D capabilities, and further the development of its strategic initiatives. Among the aims of the projects supported by the Program are establishment of engineering proof-of-principle''; development of an instrumental prototype, method, or system; or discovery in fundamental science. Several of these project are closely associated with major strategic thrusts of the Laboratory as described in Argonne's Five Year Institutional Plan, although the scientific implications of the achieved results extend well beyond Laboratory plans and objectives. The projects supported by the Program are distributed across the major programmatic areas at Argonne. Areas of emphasis are (1) advanced accelerator and detector technology, (2) x-ray techniques in biological and physical sciences, (3) advanced reactor technology, (4) materials science, computational science, biological sciences and environmental sciences. Individual reports summarizing the purpose, approach, and results of projects are presented.

Not Available

1991-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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281

Method for directional hydraulic fracturing  

DOE Patents [OSTI]

A method for directional hydraulic fracturing using borehole seals to confine pressurized fluid in planar permeable regions, comprising: placing a sealant in the hole of a structure selected from geologic or cemented formations to fill the space between a permeable planar component and the geologic or cemented formation in the vicinity of the permeable planar component; making a hydraulic connection between the permeable planar component and a pump; permitting the sealant to cure and thereby provide both mechanical and hydraulic confinement to the permeable planar component; and pumping a fluid from the pump into the permeable planar component to internally pressurize the permeable planar component to initiate a fracture in the formation, the fracture being disposed in the same orientation as the permeable planar component.

Swanson, David E. (West St. Paul, MN); Daly, Daniel W. (Crystal, MN)

1994-01-01T23:59:59.000Z

282

COLLABORATIVE: FUSION SIMULATION PROGRAM  

SciTech Connect (OSTI)

New York University, Courant Institute of Mathematical Sciences, participated in the ???¢????????Fusion Simulation Program (FSP) Planning Activities???¢??????? [http://www.pppl.gov/fsp], with C.S. Chang as the institutional PI. FSP???¢????????s mission was to enable scientific discovery of important new plasma phenomena with associated understanding that emerges only upon integration. This requires developing a predictive integrated simulation capability for magnetically-confined fusion plasmas that are properly validated against experiments in regimes relevant for producing practical fusion energy. Specific institutional goal of the New York University was to participate in the planning of the edge integrated simulation, with emphasis on the usage of large scale HPCs, in connection with the SciDAC CPES project which the PI was leading. New York University successfully completed its mission by participating in the various planning activities, including the edge physics integration, the edge science drivers, and the mathematical verification. The activity resulted in the combined report that can be found in http://www.pppl.gov/fsp/Overview.html. Participation and presentations as part of this project are listed in a separation file.

Chang, Choong Seock

2012-06-05T23:59:59.000Z

283

Simulation of the strong interaction  

Science Journals Connector (OSTI)

...Issue New science from high-performance computing organized by Richard Catlow...lattice qcd|simulation|high-performance computing|quark masses|b physics...lattice QCD; simulation; high-performance computing; quark masses; B physics...

2002-01-01T23:59:59.000Z

284

Robot Task-Level Programming Language and Simulation  

E-Print Network [OSTI]

AbstractThis paper presents the development of a software application for Off-line robot task programming and simulation. Such application is designed to assist in robot task planning and to direct manipulator motion on sensor based programmed motion. The concept of the designed programming application is to use the power of the knowledge base for task accumulation. In support of the programming means, an interactive graphical simulation for manipulator kinematics was also developed and integrated into the application as the complimentary factor to the robot programming media. The simulation provides the designer with useful, inexpensive, off-line tools for retain and testing robotics work cells and automated assembly lines for various industrial applications. KeywordsRobot programming, task-level programming, robot languages, robot simulation, robotics software. R I.

M. Samaka

285

Memorandum, Principles Governing Departmental Directives - September 10,  

Broader source: Energy.gov (indexed) [DOE]

Principles Governing Departmental Directives - Principles Governing Departmental Directives - September 10, 2007 Memorandum, Principles Governing Departmental Directives - September 10, 2007 September 10, 2007 The Department of Energy uses directives as its primary means to establish, communicate, and institutionalize policies, requirements, and procedures for Departmental Elements and, in some instances, our contractors. The Department of Energy uses directives as its primary means to establish, communicate, and institutionalize policies, requirements, and procedures for Departmental Elements and, in some instances, our contractors. Directives help ensure that the Department operates in a safe, secure, efficient, and cost-effective manner. They promote operational consistency throughout the DOE complex, foster sound management, and

286

Simulation Modeling of Estuarine Ecosystems  

Science Journals Connector (OSTI)

A simulation model has been developed of Galveston Bay, Texas ecosystem. Secondary productivity measured by harvestable species...

Robert W. Johnson

1980-01-01T23:59:59.000Z

287

December 2003 SIMULATION NEWS EUROPE  

E-Print Network [OSTI]

Simulating High Energy Ball Mills using Discrete Events ­ page 3 Transport Logistics Study Discrete Event, CP, C10, C11, C15 11 Comparison Solutions Comparisons of Modelling and Simulation Techniques Europe, comparisons on simulation techniques Editor-in-Chief: Felix Breitenecker, TU Vienna - ARGESIM, c

Kuzmanov, Georgi

288

Plasma theory and simulation research  

SciTech Connect (OSTI)

Our research group uses both theory and simulation as tools in order to increase the understanding of instabilities, heating, diffusion, transport and other phenomena in plasmas. We also work on the improvement of simulation, both theoretically and practically. Our focus has been more and more on the plasma edge (the sheath''), interactions with boundaries, leading to simulations of whole devices (someday a numerical tokamak).

Birdsall, C.K.

1989-01-01T23:59:59.000Z

289

Bio-threat microparticle simulants  

SciTech Connect (OSTI)

A bio-threat simulant that includes a carrier and DNA encapsulated in the carrier. Also a method of making a simulant including the steps of providing a carrier and encapsulating DNA in the carrier to produce the bio-threat simulant.

Farquar, George Roy; Leif, Roald

2014-09-16T23:59:59.000Z

290

Computer Simulations of Protein Folding  

E-Print Network [OSTI]

CHAPTER 8 Computer Simulations of Protein Folding VIJAY S. PANDE , ERIC J. SORIN , CHRISTOPHER D, CA 94305, USA 8.1 Introduction: Goals and Challenges of Simulating Protein Folding Computer as well as recent applications of this methodology. 8.1.1 Simulating Protein Folding Proteins play

Sorin, Eric J.

291

Wear 266 (2009) 822831 Contents lists available at ScienceDirect  

E-Print Network [OSTI]

simulation Wear integration Finite element method a b s t r a c t In this paper, numerical integrationWear 266 (2009) 822­831 Contents lists available at ScienceDirect Wear journal homepage: www.elsevier.com/locate/wear Numerical integration schemes and parallel computation for wear prediction using finite element method Saad

Sawyer, Wallace

292

Mechanical Design and Modeling of an Omni-directional RoboCup Player Brian Carter1  

E-Print Network [OSTI]

graduate student, this was a simple two wheeled robot with skids on the front and a roller ball on the back is derived in a symbolic form, assuming that no slip occurs on the wheel in the spin direction. Finally, a simulation example demonstrates simple independent PID wheel control for the complex coupled nonlinear

Williams II, Robert L.

293

Direct seismic energy modeling and application to the 1979 Imperial Valley earthquake  

E-Print Network [OSTI]

Direct seismic energy modeling and application to the 1979 Imperial Valley earthquake Pascal in fracture and relaxation. We apply this to a dynamic simulation of the 1979 Imperial Valley earthquake to the 1979 Imperial Valley earthquake, Geophys. Res. Lett., 30(5), 1198, doi:10.1029/2002GL015968, 2003. 1

Archuleta, Ralph

294

A Steering Model of Endothelial Sheet Migration Recapitulates Monolayer Integrity and Directed Collective Migration  

Science Journals Connector (OSTI)

...genetically modular control processes to generate complex systems...blood vessels. Our model simulations show that directed motility...migration. A similar process may apply to vessel sprouting...thickening and extracellular matrix proteoglycans. Cardiovasc...supplemental text Zipped PDF file, 179K. A steering...

Philip Vitorino; Mark Hammer; Jongmin Kim; Tobias Meyer

2010-10-25T23:59:59.000Z

295

Structural Design and Parameter Research on the Biomass Direct-fired Stirling Engine  

Science Journals Connector (OSTI)

It makes a brief description of the forms and main parameters of the ? Stirling engine with the rhombic drive mechanism. The paper makes a deep analysis and found mathematical models on the cycle performance of ? Stirling engine, illustrates ... Keywords: Stirling engine, biomass, direct-fired, rhombic driving mechanism, performance simulation

Xu Zhang; Yan Ma

2010-08-01T23:59:59.000Z

296

Direct measurement of thin-film thermoelectric figure of merit Rajeev Singh,1,a  

E-Print Network [OSTI]

conductivity of the thermoelectric material. Self-consistent finite-element simulations of the three. © 2009 American Institute of Physics. DOI: 10.1063/1.3094880 Thermoelectric materials are playing application of thermoelectric materials is in direct thermal-to-electrical energy conversion. Because

Bowers, John

297

Study on Alternative Refrigerants for Direct Expansion Solar Assisted Heat Pump System  

Science Journals Connector (OSTI)

This paper reports the investigation results of the possibilities for using pure and mixed refrigerants as working fluids to replace R22 for the DX-SAHP systems. Firstly, pure refrigerants are compared in terms of COP, discharge temperature and mass ... Keywords: direct expansion, heat pump, refrigerant, steady state, simulation

Hong Li

2012-05-01T23:59:59.000Z

298

An ab initio direct classical trajectory study of s-tetrazine photodissociation  

E-Print Network [OSTI]

An ab initio direct classical trajectory study of s-tetrazine photodissociation Xiaosong Li, Smriti Article on the web 9th May 2002 The photodissociation of s-tetrazine via a three-body fragmentation , respectively. To simulate the experimental photolysis of s-tetrazine, trajectories were started from

Schlegel, H. Bernhard

299

Simulations of an offshore wind farm using large eddy simulation and a torque-controlled actuator disc model  

E-Print Network [OSTI]

We present here a computational fluid dynamics (CFD) simulation of Lillgrund offshore wind farm, which is located in the {\\O}resund Strait between Sweden and Denmark. The simulation combines a dynamic representation of wind turbines embedded within a Large-Eddy Simulation CFD solver, and uses hr-adaptive meshing to increase or decrease mesh resolution where required. This allows the resolution of both large scale flow structures around the wind farm, and local flow conditions at individual turbines; consequently, the response of each turbine to local conditions can be modelled, as well as the resulting evolution of the turbine wakes. This paper provides a detailed description of the turbine model which simulates interactions between the wind, turbine rotors, and turbine generators by calculating the forces on the rotor, the body forces on the air, and instantaneous power output. This model was used to investigate a selection of key wind speeds and directions, investigating cases where a row of turbines would ...

Creech, Angus; Maguire, A Eoghan

2014-01-01T23:59:59.000Z

300

Definition: Geothermal Direct Use | Open Energy Information  

Open Energy Info (EERE)

Geothermal Direct Use Geothermal Direct Use Jump to: navigation, search Dictionary.png Geothermal Direct Use Low- to moderate-temperature water from geothermal reservoirs can be used to provide heat directly to buildings, or other applications that require heat. Generally, the water in the geothermal reservoirs withdrawn for direct use is between 68° F to 302° F. In addition to residential, commercial and industrial buildings, homes, pools and spas, greenhouses, fish farms, and even mining operations utilize direct use of geothermal resources for heat[1][2] View on Wikipedia Wikipedia Definition Geothermal heating is the direct use of geothermal energy for heating applications. Humans have taken advantage of geothermal heat this way since the Paleolithic era. Approximately seventy countries made direct

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

KUKA.CNC A Direct Approach  

Science Journals Connector (OSTI)

Direct processing of G-code with the integrated CNC kernel on the robot controller is now possible. KUKA Roboter GmbH has developed KUKA.CNC that can be used to execute DIN 66025-compliant CNC programmes directly...

Alexander Bay

2012-12-01T23:59:59.000Z

302

Direct Combination: A New User Interaction  

Science Journals Connector (OSTI)

Direct Combination (DC) is a recently introduced user interaction principle. The principle (previously applied to desktop computing) can greatly reduce the degree of search, time, and attention required to operate user interfaces. We argue that Direct ...

Simon Holland; David R. Morse; Henrik Gedenryd

2002-09-01T23:59:59.000Z

303

Metal-directed protein self-assembly  

E-Print Network [OSTI]

Metal-Directed Protein Self- Assembly. Acc. Chem. Res. 43,Metal-directed protein self-assembly. Acc. Chem. Res. 43,Metal- mediated self-assembly of protein superstructures:

Salgado. Eric N.

2010-01-01T23:59:59.000Z

304

References - DOE Directives, Delegations, and Requirements  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Regulations (DEAR) CFR Code of Federal Regulations CFR (annual edition) 10 CFR 430 10 CFR 830 10 CFR 835 10 CFR 850 10 CFR 851 Directives Review Board Directives Review Board...

305

BIOMEDICAL MATHEMATICS: Promising Directions in Imaging,  

E-Print Network [OSTI]

BIOMEDICAL MATHEMATICS: Promising Directions in Imaging, Therapy Planning, and Inverse Problems #12;BIOMEDICAL MATHEMATICS: Promising Directions in Imaging, Therapy Planning, and Inverse Problems Yair Censor, Ming Jiang, Ge Wang Editors The Huangguoshu International Interdisciplinary Conference on Biomedical

Censor, Yair

306

Simulating Complex Window Systems using BSDF Data  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Complex Window Systems using BSDF Data Complex Window Systems using BSDF Data Title Simulating Complex Window Systems using BSDF Data Publication Type Conference Paper LBNL Report Number LBNL-4416E Year of Publication 2009 Authors Lee, Eleanor S., Jacob C. Jonsson, and Maria Konstantoglou Call Number LBNL-4416E Abstract Nowadays, virtual models are commonly used to evaluate the performance of conventional window systems. Complex fenestration systems can be difficult to simulate accurately not only because of their geometry but also because of their optical properties that scatter light in an unpredictable manner. Bi-directional Scattering Distribution Functions (BSDF) have recently been developed based on a mixture of measurements and modelling to characterize the optics of such systems. This paper describes the workflow needed to create then use these BSDF datasets in the Radiance lighting simulation software. Limited comparisons are made between visualizations produced using the standard ray-tracing method, the BSDF method, and that taken in a full-scale outdoor mockup.

307

Software Framework for Advanced Power Plant Simulations  

SciTech Connect (OSTI)

This report summarizes the work accomplished during the Phase II development effort of the Advanced Process Engineering Co-Simulator (APECS). The objective of the project is to develop the tools to efficiently combine high-fidelity computational fluid dynamics (CFD) models with process modeling software. During the course of the project, a robust integration controller was developed that can be used in any CAPE-OPEN compliant process modeling environment. The controller mediates the exchange of information between the process modeling software and the CFD software. Several approaches to reducing the time disparity between CFD simulations and process modeling have been investigated and implemented. These include enabling the CFD models to be run on a remote cluster and enabling multiple CFD models to be run simultaneously. Furthermore, computationally fast reduced-order models (ROMs) have been developed that can be 'trained' using the results from CFD simulations and then used directly within flowsheets. Unit operation models (both CFD and ROMs) can be uploaded to a model database and shared between multiple users.

John Widmann; Sorin Munteanu; Aseem Jain; Pankaj Gupta; Mark Moales; Erik Ferguson; Lewis Collins; David Sloan; Woodrow Fiveland; Yi-dong Lang; Larry Biegler; Michael Locke; Simon Lingard; Jay Yun

2010-08-01T23:59:59.000Z

308

EA-280 Direct Energy Marketing Inc | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Direct Energy Marketing Inc EA-280 Direct Energy Marketing Inc Order authorizing Direct Energy Marketing Inc to export electric energy to Canada. EA-280 Direct Energy Marketing...

309

Delegation Procedures - DOE Directives, Delegations, and Requirements  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Energy's primary means of establishing policies, requirements, responsibilities, and procedures for Departmental elements and contractors. Directives Program Management Camille...

310

Direct Electrochemistry and Electrocatalysis of Myoglobin Immobilized...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Electrochemistry and Electrocatalysis of Myoglobin Immobilized on Graphene-CTAB-Ionic Liquid Nanocomposite Film. Direct Electrochemistry and Electrocatalysis of Myoglobin...

311

Strategic Directions for Hydrogen Delivery Workshop Proceedings  

Broader source: Energy.gov [DOE]

Proceedings from the Strategic Directions for Hydrogen Delivery Workshop held May 7-8, 2003 in Washington, DC. Author: Energetics

312

Extension of DOE Directives on Security  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

This Notice extends 15 Office of Security and Emergency Operation directives that have expired or will expire until December 31, 2001. This Notice will remain in effect until its expiration date or until new/revised directives are published. The following statement will be added to the summary of the extended directives-DOE N 251.40, dated 5/3/01, extends this directive until 12/31/01.

2001-12-31T23:59:59.000Z

313

Hydrothermal industrialization: direct heat development. Final report  

SciTech Connect (OSTI)

A description of hydrothermal resources suitable for direct applications, their associated temperatures, geographic distribution and developable capacity are given. An overview of the hydrothermal direct-heat development infrastructure is presented. Development activity is highlighted by examining known and planned geothermal direct-use applications. Underlying assumptions and results for three studies conducted to determine direct-use market penetration of geothermal energy are discussed.

Not Available

1982-05-01T23:59:59.000Z

314

Current Direct Neutrino Mass Experiments  

E-Print Network [OSTI]

In this contribution we review the status and perspectives of direct neutrino mass experiments. These experiments investigate the kinematics of $\\beta$-decays of specific isotopes ($^3$H, $^{187}$Re, $^{163}$Ho) to derive model-independent information on the averaged electron (anti-) neutrino mass, which is formed by the incoherent sum of the neutrino mass eigenstates contributing to the electron neutrino. We first review the kinematics of $\\beta$-decay and the determination of the neutrino mass, before giving a brief overview of past neutrino mass measurements (SN1987a-ToF studies, Mainz and Troitsk experiments for $^3$H, cryo-bolometers for $^{187}$Re). We then describe the Karlsruhe Tritium Neutrino (KATRIN) experiment which is currently under construction at Karlsruhe Institute of Technology. The large-scale setup will use the MAC-E-Filter principle pioneered earlier to push the sensitivity down to a value of 200 meV(90% C.L.). KATRIN faces many technological challenges that have to be resolved with regar...

Drexlin, G; Mertens, S; Weinheimer, C

2013-01-01T23:59:59.000Z

315

Direct detector for terahertz radiation  

DOE Patents [OSTI]

A direct detector for terahertz radiation comprises a grating-gated field-effect transistor with one or more quantum wells that provide a two-dimensional electron gas in the channel region. The grating gate can be a split-grating gate having at least one finger that can be individually biased. Biasing an individual finger of the split-grating gate to near pinch-off greatly increases the detector's resonant response magnitude over prior QW FET detectors while maintaining frequency selectivity. The split-grating-gated QW FET shows a tunable resonant plasmon response to FIR radiation that makes possible an electrically sweepable spectrometer-on-a-chip with no moving mechanical optical parts. Further, the narrow spectral response and signal-to-noise are adequate for use of the split-grating-gated QW FET in a passive, multispectral terahertz imaging system. The detector can be operated in a photoconductive or a photovoltaic mode. Other embodiments include uniform front and back gates to independently vary the carrier densities in the channel region, a thinned substrate to increase bolometric responsivity, and a resistive shunt to connect the fingers of the grating gate in parallel and provide a uniform gate-channel voltage along the length of the channel to increase the responsivity and improve the spectral resolution.

Wanke, Michael C. (Albuquerque, NM); Lee, Mark (Albuquerque, NM); Shaner, Eric A. (Albuquerque, NM); Allen, S. James (Santa Barbara, CA)

2008-09-02T23:59:59.000Z

316

Simulating Cosmic Reionization  

E-Print Network [OSTI]

The Cosmic Dark Ages and the Epoch of Reionization constitute a crucial missing link in our understanding of the evolution of the intergalactic medium and the formation and evolution of galaxies. Due to the complex nature of this global process it is best studied through large-scale numerical simulations. This presents considerable computational challenges. The dominant contributors of ionizing radiation were dwarf galaxies. These tiny galaxies must be resolved in very large cosmological volumes in order to derive their clustering properties and the corresponding observational signatures correctly, which makes this one of the most challenging problems of numerical cosmology. We have recently performed the largest and most detailed simulations of the formation of early cosmological large-scale structures and their radiative feedback leading to cosmic reionization. This was achieved by running extremely large (up to 29 billion-particle) N-body simulations of the formation of the Cosmic Web, with enough particles and sufficient force resolution to resolve all the galactic halos with total masses larger than 10^8 Solar masses in computational volumes of up to (163 Mpc)^3. These results were then post-processed by propagating the ionizing radiation from all sources by using fast and accurate ray-tracing radiative transfer method. Both of our codes are parallelized using a combination of MPI and OpenMP and to this date have been run efficiently on up to 2048 cores (N-body) and up to 10000 cores (radiative transfer) on the newly-deployed Sun Constellation Linux Cluster at the Texas Advanced Computing Center. In this paper we describe our codes, parallelization strategies, scaling and some preliminary scientific results. (abridged)

Ilian T. Iliev; Paul R. Shapiro; Garrelt Mellema; Hugh Merz; Ue-Li Pen

2008-06-17T23:59:59.000Z

317

JORDAN HALL Directions from San Francisco  

E-Print Network [OSTI]

JORDAN HALL Directions from San Francisco · Take Highway 101 South. · Exit at Embarcadero Rd, underneath the placard that reads "Jordan Hall". Directions from San Jose · Take Highway 101 North. · Exit at the end of Palm Drive, underneath the placard that reads "Jordan Hall". Directions from Oakland/East Bay

Wagner, Anthony

318

Concentration of Atmospheric Radon and Wind Direction  

Science Journals Connector (OSTI)

... in Lisbon, near the sea, is therefore excellent to test any probable relationship between radon concentration and wind directions since only half the possible wind directions are continental ones, ... since only half the possible wind directions are continental ones, therefore corresponding probably to higher radon concentrations. In order to study any correlation, the concentration of ...

F. BARREIRA

1961-06-17T23:59:59.000Z

319

Unipolar arc simulation device  

SciTech Connect (OSTI)

We describe a simple laboratory device for establishing a vacuum arc plasma discharge that can serve to simulate a unipolar arc. The technique makes use of a triggered vacuum arc plasma gun to generate a plasma plume that in turn causes breakdown of a secondary discharge. The device is in fact a secondary vacuum arc discharge that is triggered by a primary vacuum arc discharge, with some of the features of the secondary plasma discharge having similarities with a unipolar arc configuration. Here we describe the experimental setup and outline how the device can be used for some areas of unipolar arc materials research. [copyright] [ital 1999 American Institute of Physics.

Wang, S.G.; Brown, I.G. (Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States))

1999-09-01T23:59:59.000Z

320

SEALING SIMULATED LEAKS  

SciTech Connect (OSTI)

This report details the testing equipment, procedures and results performed under Task 7.2 Sealing Simulated Leaks. In terms of our ability to seal leaks identified in the technical topical report, Analysis of Current Field Data, we were 100% successful. In regards to maintaining seal integrity after pigging operations we achieved varying degrees of success. Internal Corrosion defects proved to be the most resistant to the effects of pigging while External Corrosion proved to be the least resistant. Overall, with limitations, pressure activated sealant technology would be a viable option under the right circumstances.

Michael A. Romano

2004-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Gyrokinetic large eddy simulations  

SciTech Connect (OSTI)

The large eddy simulation approach is adapted to the study of plasma microturbulence in a fully three-dimensional gyrokinetic system. Ion temperature gradient driven turbulence is studied with the GENE code for both a standard resolution and a reduced resolution with a model for the sub-grid scale turbulence. A simple dissipative model for representing the effect of the sub-grid scales on the resolved scales is proposed and tested. Once calibrated, the model appears to be able to reproduce most of the features of the free energy spectra for various values of the ion temperature gradient.

Morel, P.; Navarro, A. Banon; Albrecht-Marc, M.; Carati, D. [Statistical and Plasma Physics Laboratory, Universite Libre de Bruxelles, Bruxelles 1050 (Belgium); Merz, F.; Goerler, T.; Jenko, F. [Max-Planck-Institut fuer Plasmaphysik, Boltzmannstr. 2, D-85748 Garching (Germany)

2011-07-15T23:59:59.000Z

322

Williamson house as simulated by the DEROB system: a field validation  

SciTech Connect (OSTI)

Hourly temperature data for the Williamson residence, a direct gain, passive solar house in Santa Fe, New Mexico, were simulated by the DEROB System, a flexible set of Fortran programs for the dynamic simulation of the thermal performance of passive solar buildings of arbitrary geometries. The simulation was run on the CDC Dual Cyber 170/750 computer at the University of Texas at Austin. The results of the simulation were matched against hourly thermal performance data collected at the Williamson house site. The simulation results were compared with 7 days of data corresponding to the period from December 26, 1978 through January 1, 1979. Results of the simulation showed that the predicted temperatures for internal and external walls were very closely correlated with the recorded values. The simulated clerestory volume temperatures also showed close approximation to the recorded globe temperature, with most predictions falling within 4.2/sup 0/C of the recorded values.

Wysocki, M.D.; Arumi-Noe, F.N.; Chabannes, G.

1980-01-01T23:59:59.000Z

323

The Roles of Sparse Direct Methods in Large-scale Simulations  

E-Print Network [OSTI]

Although the fusion group at PPPL performs production runs1 codes. As a result, the PPPL team can run the largest jobs

Li, Xiaoye S.; Gao, Weiguo; Husbands, Parry J.R.; Yang, Chao; Ng, Esmond G.

2005-01-01T23:59:59.000Z

324

Study of multi-component fuel premixed combustion using direct numerical simulation  

E-Print Network [OSTI]

of and the relative species proportions in these gases however vary considerably. The Syngas obtained by coal gasification is mostly composed of hydrogen and carbon monoxide with varying levels of carbon dioxide, water and other trace species [2, 3]. The relative... proportions of the predominant gases vary widely depending on the gasification process and the ratio of hydrogen to carbon monoxide mole fractions in the fuel, fH2 = XH2/XCO, is typically larger than 0.1 and it can be as high as 3 [1, 2, 4, 5, 6, 7, 8...

Nikolaou, Zacharias M.

2014-04-29T23:59:59.000Z

325

Advancing predictive models for particulate formation in turbulent flames via massively parallel direct numerical simulations  

Science Journals Connector (OSTI)

...147. The pressure is atmospheric. The gas-phase hydrodynamics...formulation is the high-order inter...aeroderivative combustors, while the...fraction is highest (figure-4...scavenging gas-phase precursors...flame of natural gas and air...based on the high Da number...

2014-01-01T23:59:59.000Z

326

Direct numerical simulation of electroconvective instability and hysteretic current-voltage response of a permselective membrane  

E-Print Network [OSTI]

We present a systematic, multiscale, fully detailed numerical modeling for dynamics of fluid flow and ion transport covering Ohmic, limiting, and overlimiting current regimes in conductance of ion-selective membrane. By ...

Pham, Van Sang

327

Direct Numerical Simulation of Supersonic Turbulent Boundary Layer over a Compression Ramp  

E-Print Network [OSTI]

they impinge on a surface. Yet, STBLI problems are of great importance for the efficient design of scramjet

Martín, Pino

328

Consistent modeling of hypersonic nonequilibrium flows using direct simulation Monte Carlo.  

E-Print Network [OSTI]

??Hypersonic flows involve strong thermal and chemical nonequilibrium due to steep gradients in gas properties in the shock layer, wake, and next to vehicle surfaces. (more)

Zhang, Chonglin

2013-01-01T23:59:59.000Z

329

A study of surface roughening in fcc metals using direct numerical simulation  

E-Print Network [OSTI]

. Radovitzky a,*, A. Cuitin~o b a Department of Aeronautics and Astronautics, Massachusetts Institute. An improved understanding of the origin of surface roughening profiles in plastically strained aluminum polycrystalline aluminum samples under uniaxial and biaxial loading con- ditions. The results obtained show

Barr, Al

330

DYNAMIC SIMULATION OF MONO-TUBE CAVITY RECEIVERS FOR DIRECT STEAM GENERATION  

E-Print Network [OSTI]

that includes a 4 cylinder steam engine coupled with a 3 phase generator. This paper describes ongoing research cavity receiver [2] mounted to the 500 m2 dish receiver supports, a modified steam engine coupled transports superheated steam via rotary joints to the ground and then to a 4 cylinder steam engine

331

Double-diffusive interfaces in Lake Kivu reproduced by direct numerical simulations  

E-Print Network [OSTI]

for Coastal Research, Helmholtz-Zentrum Geesthacht, Geesthacht, Germany, 5 Physics of Aquatic Systems

Wehrli, Bernhard

332

Advancing predictive models for particulate formation in turbulent flames via massively parallel direct numerical simulations  

Science Journals Connector (OSTI)

...gaseous flames in gas turbine combustion chambers...using a flamelet/progress variable approach...flame of natural gas. Combust. Flame...and R Suntz. 2002 Progress in characterization...calculations. Technical report, University of Technology...

2014-01-01T23:59:59.000Z

333

Electrochimica Acta 51 (2006) 31393150 Direct numerical simulation (DNS) modeling of PEFC electrodes  

E-Print Network [OSTI]

Elsevier Ltd. All rights reserved. Keywords: Polymer electrolyte fuel cell; Cathode catalyst layer; Pore. The fuel (i.e. hydrogen) and oxidant (i.e. oxygen) react electrochemically in the active catalyst layers) model is developed to achieve pore-level description of polymer electrolyte fuel cell (PEFC) electrodes

334

The Roles of Sparse Direct Methods in Large-scale Simulations  

E-Print Network [OSTI]

and Joshua Breslau from Princeton Plasma Physics Laboratory,Jardin et al. [4] at Princeton Plasma Physics Laboratory. Itreport, Plasma Physics Laboratory, Princeton University,

Li, Xiaoye S.; Gao, Weiguo; Husbands, Parry J.R.; Yang, Chao; Ng, Esmond G.

2005-01-01T23:59:59.000Z

335

Methods of Conditioning Direct Methanol Fuel Cells  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Methods of Conditioning Direct Methanol Fuel Cells Methods of Conditioning Direct Methanol Fuel Cells Methods of Conditioning Direct Methanol Fuel Cells Methods for conditioning the membrane electrode assembly of a direct methanol fuel cell ("DMFC") are disclosed. Available for thumbnail of Feynman Center (505) 665-9090 Email Methods of Conditioning Direct Methanol Fuel Cells Methods for conditioning the membrane electrode assembly of a direct methanol fuel cell ("DMFC") are disclosed. In a first method, an electrical current of polarity opposite to that used in a functioning direct methanol fuel cell is passed through the anode surface of the membrane electrode assembly. In a second method, methanol is supplied to an anode surface of the membrane electrode assembly, allowed to cross over the polymer

336

DIRECT LIQUEFACTION PROOF OF CONCEPT  

SciTech Connect (OSTI)

The eighth bench scale test of POC program, Run PB-08, was successfully completed from August 8 to August 26, 1997. A total of five operating conditions were tested aiming at evaluating the reactivity of different pyrolysis oils in liquefaction of a Wyoming sub-bituminous coal (Black Thunder coal). For the first time, water soluble promoters were incorporated into the iron-based GelCat to improve the dispersion of the promoter metals in the feed blend. The concentration of the active metals, Mo and Fe, was 100 and 1000 ppm of moisture-free coal, respectively. Black Thunder coal used in this run was the same batch as tested in HTI?s Run POC-02. Similar to Runs PB-01 through 7, this run employed two back mixed slurry reactors, an interstage gas/slurry separator and a direct-coupled hydrotreater. In addition to the hot vapor from the second stage separator, the first stage separator overhead liquid was also fed to the hydrotreater, which was packed with Criterion C-411 hydrotreating catalyst. Pyrolysis oil was produced off-line from a pyrolysis unit acquired from University of Wyoming. Solids rejection was achieved by purging out pressure filter solid. The recycle solvents consisted of O-6 separator bottoms and pressure filter liquid (PFL). The Run PB-08 proceeded very smoothly without any interruptions. Coal conversion consistently above 90W% was achieved. High resid conversion and distillate yield have been obtained from co-processing of coal and 343C+ (650F+) pyrolysis oil. Light gas (C1-C3 ) yield was minimized and hydrogen consumption was reduced due to the introduction of pyrolysis oil, compared with conventional coal-derived solvent. Catalytic activity was improved by incorporating a promoter metal into the iron-based GelCat. It seemed that lowering the first stage temperature to 435C might increase the hydrogenation function of the promoter metal. In comparison with previous coal-waste coprocessing run (PB-06), significant improvements in the process performance were achieved due to catalyst modification and integration of pyrolysis technique into liquefaction.

NONE

1998-09-01T23:59:59.000Z

337

Experimental spectra analysis in THM with the help of simulation based on Geant4 framework  

E-Print Network [OSTI]

The Coulomb barrier and electron screening cause difficulties in directly measuring nuclear reaction cross sections of charged particles in astrophysical energies. The Trojan-horse method has been introduced to solve the difficulties as a powerful indirect tool. In order to understand experimental spectra better, Geant4 is employed to simulate the method for the first time. Validity and reliability of the simulation are examined by comparing the experimental data with simulated results. The Geant4 simulation can give useful information to understand the experimental spectra better in data analysis and is beneficial to the design for future related experiments.

Chengbo Li; Qungang Wen; Shuhua Zhou; Yuanyong Fu; Jing Zhou; Qiuying Meng; Zongjun Jiang; Xiaolian Wang

2014-08-27T23:59:59.000Z

338

Direct control of doubly fed induction generator fed by PWM converter with a variable structure control based on a sliding mode control  

Science Journals Connector (OSTI)

This paper presents a direct control of doubly fed induction generator (DFIG) with a variable structure control based on ... and reactive power performance when it applies to DFIG. Simulation results and improvem...

Youcef Bekakra; Djilani Ben Attous

2014-09-01T23:59:59.000Z

339

Exploiting simultaneous observational constraints on mass and absorption to estimate the global direct radiative forcing of black carbon and brown carbon  

E-Print Network [OSTI]

Atmospheric black carbon (BC) is a leading climate warming agent, yet uncertainties on the global direct radiative forcing (DRF) remain large. Here we expand a global model simulation (GEOS-Chem) of BC to include the ...

Schwarz, J. P.

340

THERM NFRC Simulation Manual  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

/ WINDOW 6.3 / WINDOW 6.3 NFRC Simulation Manual Lawrence Berkeley National Laboratory July 2013 DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product process, or service by its trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement,

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

LSST beam simulator  

Science Journals Connector (OSTI)

It is always important to test new imagers for a mosaic camera before device acceptance and constructing the mosaic. This is particularly true of the LSST CCDs due to the fast beam illumination: at long wavelengths there can be significant beam divergence (defocus) inside the silicon because of the long absorption length for photons near the band gap. Moreover, realistic sky scenes need to be projected onto the CCD focal plane Thus, we need to design and build an f/1.2 re-imaging system. The system must simulate the entire LSST1 operation, including a sky with galaxies and stars with approximately black-body spectra superimposed on a spatially diffuse night sky emission with its complex spectral features.

J A Tyson; J Sasian; C Claver; G Muller; K Gilmor; M Klint

2014-01-01T23:59:59.000Z

342

Dynamic simulation of Odoo  

Science Journals Connector (OSTI)

Abstract The thermal habits of Odoo were examined and energy consumption data were also predicted. Special tests were performed for the time of the competition, and whole year was also analysed. The climatic data were of Madrid as the competition took place there. The modelling environment was MATLAB's Simulink with a built-in module of Simscape. It is for especially examining thermal behaviours. MATLAB itself is capable of solving differential equations by time, for this reason dynamic simulations can be performed. First the building structure was created, and then the heatflows affecting the internal temperature were added. In this paper detailed process of creating the model is presented, and some results are discussed, including some possibilities of further improvements.

Gbor Haas-Schnabel; Csaba Szikra

2014-01-01T23:59:59.000Z

343

Environmental gaming simulation network  

Science Journals Connector (OSTI)

This paper describes the construction of an infrastructure for global peace gaming, in particular on the issue of environmental and sustainable development in Third World countries. The gaming is intended to train would-be decision-makers in crisis management, conflict resolution and negotiation techniques. Experience shows that the expertise necessary to participate in peace games does not exist in many parts of the world. To help educate future participants, and to promote the cause of peace by enhancing exchanges of education and joint research, the Global Systems Analysis and Simulation (GLOSAS) Project is attempting to create a global (electronic) university consortium. This paper provides a brief account of the steps taken over the past 12 years which have led to the development of the Global University now being organised to meet the challenge of global issues both today and in the 21st century.

Takeshi Utsumi; Philip S. Gang

1991-01-01T23:59:59.000Z

344

Lattice Boltzmann Simulation Optimization  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Boltzmann Boltzmann Simulation Optimization on Leading Multicore Platforms Selected as Best Paper in Application Track, IPDPS 2008, April 14-28, Miami, Florida, USA Samuel Williams † , Jonathan Carter , Leonid Oliker John Shalf , Katherine Yelick † CRD/NERSC, Lawrence Berkeley National Laboratory Berkeley, CA 94720 † CS Division, University of California at Berkeley, Berkeley, CA 94720 {SWWilliams, JTCarter, LOliker, JShalf, KAYelick}@lbl.gov Abstract We present an auto-tuning approach to optimize ap- plication performance on emerging multicore architec- tures. The methodology extends the idea of search- based performance optimizations, popular in linear al- gebra and FFT libraries, to application-specific com- putational kernels. Our work applies this strategy to a lattice Boltzmann application (LBMHD) that histor- ically has made poor use of scalar microprocessors

345

Simulation of dust streaming in toroidal traps: Stationary flows  

SciTech Connect (OSTI)

Molecular-dynamic simulations were performed to study dust motion in a toroidal trap under the influence of the ion drag force driven by a Hall motion of the ions in E x B direction, gravity, inter-particle forces, and friction with the neutral gas. This article is focused on the inhomogeneous stationary streaming motion. Depending on the strength of friction, the spontaneous formation of a stationary shock or a spatial bifurcation into a fast flow and a slow vortex flow is observed. In the quiescent streaming region, the particle flow features a shell structure which undergoes a structural phase transition along the flow direction.

Reichstein, Torben; Piel, Alexander [IEAP, Christian-Albrechts-Universitaet, D-24098 Kiel (Germany)

2011-08-15T23:59:59.000Z

346

Terascale Optimal PDE Simulations (TOPS) Center  

SciTech Connect (OSTI)

This report covers the period from Oct. 2002 to Sep. 2004 when Old Dominion University (ODU) was the lead institution for the TOPS ISIC, until in Oct. 2004 Columbia University replaced ODU as the lead institution. The TOPS members from ODU focused on various aspects of the linear and nonlinear solver infrastructure required by the partial differential equations simulation codes, working directly with SciDAC teams from the Fusion Energy Sciences program: the Center for Extended agnetohydrodynamic Modeling (CEMM) at Princeton, and with the Center for Magnetic Reconnection Studies (CMRS) at University of New Hampshire. With CEMM we worked with their MHD simulation code, called M3D, which is semi-implicit, requiring linear solves but no onlinear solves. We contributed several improvements to their current semi-implicit code. Among these was the use of multilevel reconditioning, which provides optimal scaling. This was done through the multigrid preconditioner available in Hypre, another major solver package available in TOPS. We also provided them direct solver functionality for their linear solves since they may be required for more accurate solutions in some regimes. With the CMRS group, we implemented a fully implicit parallel magnetic reconnection simulation code, built on top of PETSc. Our first attempt was a Krylov linear iteration (GMRES because of the lack of symmetry), within each nonlinear (Newton) iteration, with optimal multilevel preconditioning, using the geometric multigrid preconditioner from PETSc. However, for reasons that we have not yet fully understood, the multigrid preconditioner fails early in the simulation, breaking the outer Newton iteration. Much better results were obtained after switching from optimal multilevel preconditioning to suboptimal one level preconditioning. Our current code, based on the additive Schwartz preconditioner from in PETSc, with ILU on subdomains, scales reasonably well, while matching the output of the original explicit code. The new Newton-Krylov-Schwarz implicitcode can take time-steps that are hundreds or thousands of times larger than the explicit code. During the three year period of this grant, we published thirteen papers and gave several invited talks at international conferences. Work on these TOPS projects continues with Columbia University as lead until Sep. 2006.

Pothen, Alex

2006-08-23T23:59:59.000Z

347

Non-detonable explosive simulators  

DOE Patents [OSTI]

A simulator which is chemically equivalent to an explosive, but is not detonable. The simulator has particular use in the training of explosives detecting dogs and calibrating sensitive analytical instruments. The explosive simulants may be fabricated by different techniques, a first involves the use of standard slurry coatings to produce a material with a very high binder to explosive ratio without masking the explosive vapor, and the second involves coating inert beads with thin layers of explosive molecules. 5 figs.

Simpson, R.L.; Pruneda, C.O.

1994-11-01T23:59:59.000Z

348

Non-detonable explosive simulators  

DOE Patents [OSTI]

A simulator which is chemically equivalent to an explosive, but is not detonable. The simulator has particular use in the training of explosives detecting dogs and calibrating sensitive analytical instruments. The explosive simulants may be fabricated by different techniques, a first involves the use of standard slurry coatings to produce a material with a very high binder to explosive ratio without masking the explosive vapor, and the second involves coating inert beads with thin layers of explosive molecules.

Simpson, Randall L. (Livermore, CA); Pruneda, Cesar O. (Livermore, CA)

1994-01-01T23:59:59.000Z

349

Definition: Direct current | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Direct current Jump to: navigation, search Dictionary.png Direct current A type of electricity transmission and distribution by which electricity flows in one direction through the conductor, usually relatively low voltage and high current (such as from a battery). To be used for typical 120 volt or 220 volt household appliances, DC must be converted to alternating current (AC).[1][2] View on Wikipedia Wikipedia Definition Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by sources such as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type. Direct current may flow in a conductor such as a wire, but can also flow

350

Transportation and Directions to Oak Ridge  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Transportation and Directions to Oak Ridge Transportation and Directions to Oak Ridge Several major airlines have frequent daily flights to the nearby Knoxville McGee Tyson Airport (TYS). Travel from the airport to Oak Ridge takes about 30 minutes via rental car or taxi, available at the airport. ORNL has developed several maps of the area. Directions to the lab from various points of origin are below. Visitors will be issued temporary passes at the guard gate and will be directed to the visitor center. Instructions for "Entering ORNL" and a map to the visitor center may be helpful. Directions to the Oak Ridge National Laboratory From McGhee Tyson Airport (~25 mi.) Upon leaving the airport, follow the exit ramp as directed for "Knoxville". Merge onto US 129 North (Alcoa Highway). After aapproximately 3 mi. exit on

351

Directional detection of dark matter streams  

Science Journals Connector (OSTI)

Directional detection of weakly interacting massive particles, in which the energies and directions of the recoiling nuclei are measured, currently presents the only prospect for probing the local velocity distribution of Galactic dark matter. We investigate the extent to which future directional detectors would be capable of probing dark matter substructure in the form of streams. We analyze the signal expected from a Sagittarius-like stream and also explore the full parameter space of stream speed, direction, dispersion and density. Using a combination of nonparametric directional statistics, a profile likelihood ratio test and Bayesian parameter inference we find that within acceptable exposure times [O(10)??kg?yr for cross sections just below the current exclusion limits] future directional detectors will be sensitive to a wide range of stream velocities and densities. We also examine and discuss the importance of the energy window of the detector.

Ciaran A.?J. OHare and Anne M. Green

2014-12-08T23:59:59.000Z

352

Measurement and simulation of pollutant emissions from marine diesel combustion engine and their reduction by exhaust gas recirculation  

Science Journals Connector (OSTI)

Taking into account the complexity and cost of a direct experimental approach, the recourse to simulation, which can also predict inaccessible information by measurement, offers an effective and fast alternative ...

Nader Larbi; Jamel Bessrour

2008-11-01T23:59:59.000Z

353

Direct conversion of algal biomass to biofuel  

SciTech Connect (OSTI)

A method and system for providing direct conversion of algal biomass. Optionally, the method and system can be used to directly convert dry algal biomass to biodiesels under microwave irradiation by combining the reaction and combining steps. Alternatively, wet algae can be directly processed and converted to fatty acid methyl esters, which have the major components of biodiesels, by reacting with methanol at predetermined pressure and temperature ranges.

Deng, Shuguang; Patil, Prafulla D; Gude, Veera Gnaneswar

2014-10-14T23:59:59.000Z

354

A parametric study of directional sea modeling  

E-Print Network [OSTI]

examines the effect due to wave loading described by the directional sea spectrum on the response of offshore structures. The use of directional seas in design is expected to provide a better representation of the ocean surface and associated kinematics... as compared to unidirectional theory. This in turn should provide a basis for minimizing the overdesign of offshore structures. Several of the more popular directional wave spreading functions are intro- duced. A parametric study is conducted in order...

Whatley, Christopher Paul

2012-06-07T23:59:59.000Z

355

Configuring the National Ignition Facility for direct-drive experiments  

SciTech Connect (OSTI)

The National Ignition Facility (NIF) is a project whose primary mission is to provide an above-ground experimental capability for maintaining nuclear competence and weapons effects simulation, and to pursue the achievement of fusion ignition utilizing solid state lasers as the energy driver. In this facility a large number of laser beams are focused onto a small target located at the center of a spherical target chamber. The laser energy is delivered in a few billionths of a second, raising the temperature and density of the nuclear materials in the target to levels where significant thermonuclear energy is released. The thermonuclear reaction proceeds very rapidly, so that the target materials remain confined by their own inertia during the thermonuclear reaction. This type of approach is called inertial confinement fusion (ICF). The proposed project is described in a conceptual design report (CDR) that was released in May 1994. Early in FY95, a collaboration between the University of Rochester and the Lawrence Livermore National Laboratory was established to study reconfiguring the NIF to accommodate direct-drive experiments. The present paper is a report to the scientific community, primarily the scientists and engineers working on the design of the NIF. It represents results from work in progress, specifically work completed by the end of the second quarter FY95. This report has two main sections. The first describes the target requirements on the laser drive, and the second part describes how the NIF laser can be configured to accommodate both indirect and direct drive. The report includes a description of the scientific basis for these conclusions. Though a complete picture does not exist, the present understanding is sufficient to conclude that the primary target requirements and laser functional requirements for indirect and direct drive are quite compatible. It is evidently straightforward to reconfigure the NIF to accommodate direct and indirect drive.

Eimerl, D. [ed.

1995-07-01T23:59:59.000Z

356

High Temperature 300C Directional Drilling System  

Broader source: Energy.gov [DOE]

Project objective: provide a directional drilling system that can be used at environmental temperatures of up to 300C; and at depths of 10; 000 meters.

357

SRNL Laboratory Directed Research & Development (LDRD)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

SRNL Laboratory Directed Research & Development (LDRD) Resources LDRD Annual Reports * 2013 * 2012 * 2011 * 2010 DOE LDRD Homepage DOE Order FY13 SRNL LDRD Annual Report The FY13...

358

Laboratory Directed Research and Development Data Sheet  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Directed Research and Development Program FY 2013 Annual Report DOCUMENT AVAILABILITY Reports produced after January 1, 1996, are generally available free via US Department of...

359

Linearized Alternating Direction Method with Gaussian Back ...  

E-Print Network [OSTI]

Oct 28, 2011 ... ?k) in the forward. (alternating) order ...... [14] M. Fukushima, Application of the alternating direction method of multipliers to separable convex.

2011-10-28T23:59:59.000Z

360

Development of foreign direct investment in Finland.  

E-Print Network [OSTI]

??During 1990 to 2009, Foreign Direct Investment (FDI henceforth) in Finland has fluctuated greatly. This paper focused on analyzing the overall development and basic characteristics (more)

Yanyan, Yan

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Optimal Direct Determination of Sparse Jacobian Matrices  

E-Print Network [OSTI]

Nov 12, 2003 ... The computational results from coloring experiments on Harwell-Boeing test matrix collection demonstrate that our row partitioned direct...

Shahadat Hossain

2003-11-12T23:59:59.000Z

362

Contact Form - DOE Directives, Delegations, and Requirements  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Contact Form by Diane Johnson Directives are the Department of Energy's Primary means of establishing policies, requirements, responsibilities, and procedures for Departmental...

363

Direct Observation of Aggregative Nanoparticle Growth: Kinetic...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Aggregative Nanoparticle Growth: Kinetic Modeling of the Size Distribution and Growth Rate. Direct Observation of Aggregative Nanoparticle Growth: Kinetic Modeling of the Size...

364

Highly Directional Antenna for Improved Communications - Energy...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in some directions while suppressing it in others, and are used in applications such as satellite communications, wireless communications, surveillance, and weather radar. As...

365

Optimization Online - Directed modified Cholesky factorizations and ...  

E-Print Network [OSTI]

This must holds with full mathematical rigor, although the computations are done in floating-point arithmetic. Similarly, a directed modified Cholesky factorization...

Ferenc Domes

366

Directed modified Cholesky factorizations and convex quadratic ...  

E-Print Network [OSTI]

Jul 3, 2014 ... done in floating-point arithmetic. Domes & Neumaier [1] presented two methods for obtaining a directed. Cholesky factorization. The method...

2014-07-03T23:59:59.000Z

367

Advanced Gasoline Turbocharged Direct Injection (GTDI) Engine...  

Broader source: Energy.gov (indexed) [DOE]

in Gasoline Turbocharged Direct Injection (GTDI) engine technology in the near term as a cost effective, high volume, fuel economy solution, marketed globally as EcoBoost...

368

Lab-directed Research & Development (LDRD) | ORNL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

was provided by ORNL's Laboratory Directed Research and Development Program. Super-hydro-tunable HiPAS Membranes were developed by ORNL (2014). Inventors were Michael Hu,...

369

Direct-Cooled Power Electronic Substrate  

Broader source: Energy.gov (indexed) [DOE]

of Energy 3 Barriers VTP Activities Related Challenges Conventional cooling methods for power electronics are typically based on conduction cooling through solids directly adjacent...

370

High Temperature 300C Directional Drilling System  

Broader source: Energy.gov (indexed) [DOE]

300C Directional Drilling System John Macpherson Baker Hughes Oilfield Operations DE-EE0002782 May 19, 2010 This presentation does not contain any proprietary confidential, or...

371

Direct electrochemistry and electrocatalysis of horseradish peroxidase...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

electrochemistry and electrocatalysis of horseradish peroxidase immobilized in hybrid organic-inorganic film of chitosan Direct electrochemistry and electrocatalysis of horseradish...

372

Ionization based multi-directional flow sensor  

DOE Patents [OSTI]

A method, system, and apparatus for conducting real-time monitoring of flow (airflow for example) in a system (a hybrid power generation system for example) is disclosed. The method, system and apparatus measure at least flow direction and velocity with minimal pressure drop and fast response. The apparatus comprises an ion source and a multi-directional collection device proximate the ion source. The ion source is configured to generate charged species (electrons and ions for example). The multi-directional collection source is configured to determine the direction and velocity of the flow in real-time.

Chorpening, Benjamin T. (Morgantown, WV); Casleton, Kent H. (Morgantown, WV)

2009-04-28T23:59:59.000Z

373

Simulation of Fusion Plasmas  

ScienceCinema (OSTI)

The upcoming ITER experiment (www.iter.org) represents the next major milestone in realizing the promise of using nuclear fusion as a commercial energy source, by moving into the ?burning plasma? regime where the dominant heat source is the internal fusion reactions. As part of its support for the ITER mission, the US fusion community is actively developing validated predictive models of the behavior of magnetically confined plasmas. In this talk, I will describe how the plasma community is using the latest high performance computing facilities to develop and refine our models of the nonlinear, multiscale plasma dynamics, and how recent advances in experimental diagnostics are allowing us to directly test and validate these models at an unprecedented level.

Chris Holland

2010-01-08T23:59:59.000Z

374

Gyrokinetics Simulation of Energetic Particle Turbulence and Transport  

SciTech Connect (OSTI)

Progress in research during this year elucidated the physics of precession resonance and its interaction with radial scattering to form phase space density granulations. Momentum theorems for drift wave-zonal flow systems involving precession resonance were derived. These are directly generalizable to energetic particle modes. A novel nonlinear, subcritical growth mechanism was identified, which has now been verified by simulation. These results strengthen the foundation of our understanding of transport in burning plasmas

Diamond, Patrick H.

2011-09-21T23:59:59.000Z

375

MAGNETOHYDRODYNAMIC SIMULATIONS OF INTERPLANETARY CORONAL MASS EJECTIONS  

SciTech Connect (OSTI)

We describe a new MHD model for the propagation of interplanetary coronal mass ejections (ICMEs) in the solar wind. Accurately following the propagation of ICMEs is important for determining space weather conditions. Our model solves the MHD equations in spherical coordinates from a lower boundary above the critical point to Earth and beyond. On this spherical surface, we prescribe the magnetic field, velocity, density, and temperature calculated typically directly from a coronal MHD model as time-dependent boundary conditions. However, any model that can provide such quantities either in the inertial or rotating frame of the Sun is suitable. We present two validations of the technique employed in our new model and a more realistic simulation of the propagation of an ICME from the Sun to Earth.

Lionello, Roberto; Downs, Cooper; Linker, Jon A.; Trk, Tibor; Riley, Pete; Miki?, Zoran, E-mail: lionel@predsci.com, E-mail: cdowns@predsci.com, E-mail: linker@predsci.com, E-mail: tibor@predsci.com, E-mail: pete@predsci.com, E-mail: mikic@predsci.com [Predictive Science, Inc., 9990 Mesa Rim Road, Suite 170, San Diego, CA 92121-2910 (United States)

2013-11-01T23:59:59.000Z

376

Simulations of Kinetic Events at the Atomic Scale  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of kinetic events at the atomic scale of kinetic events at the atomic scale Graeme Henkelman UT Austin Al / Al(100) B 3 I / Si Pd / MgO How can we simulate the dynamics of molecular systems over experimental time scales? Objective: To calculate dynamics of a surface over time scales which are much longer than can be calculated with direct classical dynamics. Problem: time scale gap fs ps ns ms ms s mins atomic dynamics thermally activated experimental vibrations simulations reaction dynamics time scales Most interesting transitions are rare 0.5 eV 1000/s events (much slower than vibrations) Simulating a transition for a typical rare event with classical dynamics can require ~10 12 force evaluations Transition state theory A statistical theory for calculating the rate of slow thermal processes

377

Global Simulation of Plasma Microturbulence at the Petascale & Beyond |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fully kinetic 3-D plasma microturbulence simulation in a tokamak fusion Fully kinetic 3-D plasma microturbulence simulation in a tokamak fusion device of the self-consistent electrostatic potential. The red and blue represent regions of positive and negative potential respectively. Elongated structures in the toroidal direction follow the magnetic field lines and is characteristic of the large anisotropy between the dynamics parallel and perpendicular to the magnetic field observed in tokamak experiments. Global Simulation of Plasma Microturbulence at the Petascale & Beyond PI Name: William Tang PI Email: wtang@princeton.edu Institution: PPPL Allocation Program: ESP Allocation Hours at ALCF: 50 Million Year: 2010 to 2013 Research Domain: Physics As the current global energy economy focuses on alternatives to fossil fuels, there is increasing interest in nuclear fusion, the power source of

378

Wave power absorption: Experiments in open sea and simulation  

Science Journals Connector (OSTI)

A full scale prototype of a wave power plant based on a direct drive linear generator driven by a point absorber has been installed at the west coast of Sweden. In this paper experimentally collected data of energy absorption for different electrical loads are used to verify a model of the wave power plant including the interactions of wave buoy generator and external load circuit. The wave-buoy interaction is modeled with linear potential wavetheory. The generator is modeled as a nonlinear mechanical damping function that is dependent on piston velocity and electric load. The results show good agreement between experiments and simulations. Potential wavetheory is well suited for the modeling of a point absorber in normal operation and for the design of future converters. Moreover the simulations are fast which opens up for simulations of wave farms.

M. Eriksson; R. Waters; O. Svensson; J. Isberg; M. Leijon

2007-01-01T23:59:59.000Z

379

MJO Simulation Diagnostics  

SciTech Connect (OSTI)

The Madden-Julian Oscillation (MJO) interacts with, and influences, a wide range of weather and climate phenomena (e.g., monsoons, ENSO, tropical storms, mid-latitude weather), and represents an important, and as yet unexploited, source of predictability at the subseasonal time scale. Despite the important role of the MJO in our climate and weather systems, current global circulation models (GCMs) exhibit considerable shortcomings in representing this phenomenon. These shortcomings have been documented in a number of multi-model comparison studies over the last decade. However, diagnosis of model performance has been challenging, and model progress has been difficult to track, due to the lack of a coherent and standardized set of MJO diagnostics. One of the chief objectives of the US CLIVAR MJO Working Group is the development of observation-based diagnostics for objectively evaluating global model simulations of the MJO in a consistent framework. Motivation for this activity is reviewed, and the intent and justification for a set of diagnostics is provided, along with specification for their calculation, and illustrations of their application. The diagnostics range from relatively simple analyses of variance and correlation, to more sophisticated space-time spectral and empirical orthogonal function analyses. These diagnostic techniques are used to detect MJO signals, to construct composite life-cycles, to identify associations of MJO activity with the mean state, and to describe interannual variability of the MJO.

Waliser, D; Sperber, K; Hendon, H; Kim, D; Maloney, E; Wheeler, M; Weickmann, K; Zhang, C; Donner, L; Gottschalck, J; Higgins, W; Kang, I; Legler, D; Moncrieff, M; Schubert, S; Stern, W; Vitart, F; Wang, B; Wang, W; Woolnough, S

2008-06-02T23:59:59.000Z

380

2, 209232, 2006 Simulation of  

E-Print Network [OSTI]

Seas, causing an expansion of sea ice that produces10 additional cooling. The consequenceCPD 2, 209­232, 2006 Simulation of Holocene cooling events H. Renssen et al. Title Page Abstract climate model simulation of Holocene cooling events: solar forcing triggers oceanic feedback H. Renssen1

Paris-Sud XI, Université de

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381

Crowd modeling and simulation technologies  

Science Journals Connector (OSTI)

As a collective and highly dynamic social group, the human crowd is a fascinating phenomenon that has been frequently studied by experts from various areas. Recently, computer-based modeling and simulation technologies have emerged to support investigation ... Keywords: Crowd simulation, crowd dynamics, human behavior, multi-agent system

Suiping Zhou; Dan Chen; Wentong Cai; Linbo Luo; Malcolm Yoke Hean Low; Feng Tian; Victor Su-Han Tay; Darren Wee Sze Ong; Benjamin D. Hamilton

2010-10-01T23:59:59.000Z

382

Supernova Simulations with Boltzmann Neutrino Transport: A Comparison of Methods  

E-Print Network [OSTI]

Accurate neutrino transport has been built into spherically symmetric simulations of stellar core collapse and postbounce evolution. The results of such simulations agree that spherically symmetric models with standard microphysical input fail to explode by the delayed, neutrino-driven mechanism. Independent groups implemented fundamentally different numerical methods to tackle the Boltzmann neutrino transport equation. Here we present a direct and detailed comparison of such neutrino radiation-hydrodynamical simulations for two codes, Agile-Boltztran of the Oak Ridge-Basel group and Vertex of the Garching group. The former solves the Boltzmann equation directly by an implicit, general relativistic discrete angle method on the adaptive grid of a conservative implicit hydrodynamics code with second-order TVD advection. In contrast, the latter couples a variable Eddington factor technique with an explicit, moving-grid, conservative high-order Riemann solver with important relativistic effects treated by an effective gravitational potential. The presented study is meant to test both neutrino radiation-hydrodynamics implementations and to provide a data basis for comparisons and verifications of supernova codes to be developed in the future. Results are discussed for simulations of the core collapse and post-bounce evolution of a 13 solar mass star with Newtonian gravity and a 15 solar mass star with relativistic gravity.

M. Liebendoerfer; M. Rampp; H. -Th. Janka; A. Mezzacappa

2003-10-22T23:59:59.000Z

383

Direct-Current Resistivity At Central Nevada Seismic Zone Region  

Open Energy Info (EERE)

At Central Nevada Seismic At Central Nevada Seismic Zone Region (Pritchett, 2004) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Direct-Current Resistivity Survey Activity Date Usefulness useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best way to find "hidden" basin and range geothermal resources of this general type is to carry out simultaneous SP and low-frequency MT surveys, and then

384

A Direct Measurement of the $W$ Decay Width  

SciTech Connect (OSTI)

A direct measurement of the W boson total decay width is presented in proton-antiproton collisions at {radical}s = 1.96 TeV using data collected by the CDF II detector. The measurement is made by fitting a simulated signal to the tail of the transverse mass distribution in the electron and muon decay channels. An integrated luminosity of 350 pb{sup -1} is used, collected between February 2002 and August 2004. Combining the results from the separate decay channels gives the decay width as 2.038 {+-} 0.072 GeV in agreement with the theoretical prediction of 2.093 {+-} 0.002 GeV. A system is presented for the management of detector calibrations using a relational database schema. A description of the implementation and monitoring of a procedure to provide general users with a simple interface to the complete set of calibrations is also given.

Vine, Troy; /University Coll. London

2008-08-01T23:59:59.000Z

385

FUEL ASSEMBLY SHAKER TEST SIMULATION  

SciTech Connect (OSTI)

This report describes the modeling of a PWR fuel assembly under dynamic shock loading in support of the Sandia National Laboratories (SNL) shaker test campaign. The focus of the test campaign is on evaluating the response of used fuel to shock and vibration loads that a can occur during highway transport. Modeling began in 2012 using an LS-DYNA fuel assembly model that was first created for modeling impact scenarios. SNLs proposed test scenario was simulated through analysis and the calculated results helped guide the instrumentation and other aspects of the testing. During FY 2013, the fuel assembly model was refined to better represent the test surrogate. Analysis of the proposed loads suggested the frequency band needed to be lowered to attempt to excite the lower natural frequencies of the fuel assembly. Despite SNLs expansion of lower frequency components in their five shock realizations, pretest predictions suggested a very mild dynamic response to the test loading. After testing was completed, one specific shock case was modeled, using recorded accelerometer data to excite the model. Direct comparison of predicted strain in the cladding was made to the recorded strain gauge data. The magnitude of both sets of strain (calculated and recorded) are very low, compared to the expected yield strength of the Zircaloy-4 material. The model was accurate enough to predict that no yielding of the cladding was expected, but its precision at predicting micro strains is questionable. The SNL test data offers some opportunity for validation of the finite element model, but the specific loading conditions of the testing only excite the fuel assembly to respond in a limited manner. For example, the test accelerations were not strong enough to substantially drive the fuel assembly out of contact with the basket. Under this test scenario, the fuel assembly model does a reasonable job of approximating actual fuel assembly response, a claim that can be verified through direct comparison of model results to recorded test results. This does not offer validation for the fuel assembly model in all conceivable cases, such as high kinetic energy shock cases where the fuel assembly might lift off the basket floor to strike to basket ceiling. This type of nonlinear behavior was not witnessed in testing, so the model does not have test data to be validated against.a basis for validation in cases that substantially alter the fuel assembly response range. This leads to a gap in knowledge that is identified through this modeling study. The SNL shaker testing loaded a surrogate fuel assembly with a certain set of artificially-generated time histories. One thing all the shock cases had in common was an elimination of low frequency components, which reduces the rigid body dynamic response of the system. It is not known if the SNL test cases effectively bound all highway transportation scenarios, or if significantly greater rigid body motion than was tested is credible. This knowledge gap could be filled through modeling the vehicle dynamics of a used fuel conveyance, or by collecting acceleration time history data from an actual conveyance under highway conditions.

Klymyshyn, Nicholas A.; Sanborn, Scott E.; Adkins, Harold E.; Hanson, Brady D.

2013-05-30T23:59:59.000Z

386

Direct fired absorption machine flue gas recuperator  

DOE Patents [OSTI]

A recuperator which recovers heat from a gas, generally the combustion gas of a direct-fired generator of an absorption machine. The recuperator includes a housing with liquid flowing therethrough, the liquid being in direct contact with the combustion gas for increasing the effectiveness of the heat transfer between the gas and the liquid.

Reimann, Robert C. (Lafayette, NY); Root, Richard A. (Spokane, WA)

1985-01-01T23:59:59.000Z

387

KINETIC ROUGHENING PHENOMENA, STOCHASTIC GROWTH, DIRECTED  

E-Print Network [OSTI]

KINETIC ROUGHENING PHENOMENA, STOCHASTIC GROWTH, DIRECTED POLYMERS AND ALL THAT Aspects 254 (1995) 215-414 Kinetic roughening phenomena, stochastic growth, directed polymers and all that for the nonlinear term 3.2. Dynamic RG analysis 3.3. A worthy detour: kinetic roughening with conservation law 3

Halpin-Healy, Tim

388

Direct phasing from Patterson syntheses by recycling  

Science Journals Connector (OSTI)

A new direct-space variant of the direct methods origin-free Patterson (or modulus) sum function is introduced. In the presence of atomicity, its application reduces, for each phase refinement cycle, to a synthesis with E2 - (or E - ) as Fourier coefficients followed by structure-factor calculation from the strongest peaks in the resulting map.

Rius, J.

2011-11-17T23:59:59.000Z

389

Establishing research directions in sustainable building design  

E-Print Network [OSTI]

Establishing research directions in sustainable building design: Koen Steemers The Martin Centre Research Technical Report 5 #12;Final Project Report Establishing research directions in sustainable building design Project ID Code: IT 1.28 Lead Investigator: Dr. Koen Steemers Period: 1st July 2001 to 30th

Watson, Andrew

390

DIRECTING THE MOVEMENT OF FISH WITH ELECTRICITY  

E-Print Network [OSTI]

DIRECTING THE MOVEMENT OF FISH WITH ELECTRICITY Marine Biological Laboratory APR 21 1953 WOODS HOLE, Albert M. Day, Director DIRECTING THE MOVH-IENT OF FISH WITH ELECTRICITY by Alberton L. McLain Fishery of an electrical leading device 21 Literature cited. ..,...,..,..........·· 2k ILLUSTRATIONS Figure Page 1. Diagram

391

Distillation: Present Status and Future Directions  

E-Print Network [OSTI]

is needed. Some effort continues in the development of new devices that promise higher capacity, better efficiency, or lower pressure drop than devices currently on the market. In England, a packed contactor that is rotated at high speed has been.... Such work is in progr~ss, some of it in academia and some of it in connedtion with servi ce bureaus offeri ng full process simulation capabilities. There is not an equivalent effort for determining transfer units in counterflow contactor simulations...

Fair, J. R.; Humphrey, J. L.

1984-01-01T23:59:59.000Z

392

ARM - PI Product - Direct Aerosol Forcing Uncertainty  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ProductsDirect Aerosol Forcing Uncertainty ProductsDirect Aerosol Forcing Uncertainty Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : Direct Aerosol Forcing Uncertainty Site(s) NSA SGP TWP General Description Understanding sources of uncertainty in aerosol direct radiative forcing (DRF), the difference in a given radiative flux component with and without aerosol, is essential to quantifying changes in Earth's radiation budget. We examine the uncertainty in DRF due to measurement uncertainty in the quantities on which it depends: aerosol optical depth, single scattering albedo, asymmetry parameter, solar geometry, and surface albedo. Direct radiative forcing at the top of the atmosphere and at the surface as well as sensitivities, the changes in DRF in response to unit changes in

393

DOE - Office of Legacy Management -- Directions  

Office of Legacy Management (LM)

Ohio > Fernald > Visitors Center > Directions Ohio > Fernald > Visitors Center > Directions Fernald Preserve Directions Fernald Preserve Directions Fernald Preserve Home Page Visitors Center Directions Event Calendar Community Meeting Room Guided Tour Educational Field Trip Speaker Request Brochures Fact Sheets Presentations BioBlitz Geocaching Pets Policy Fernald Preserve Coordinates NAD83 State Plane Ohio South Easting 1350546 Northing 476599 Latitude 39.288048 N Longitude 84.683540 W Latitude 39 17' 16.974" N Longitude 84 41' 0.746" W Fernald Preserve Addresses Site: 7400 Willey Road Harrison, OH 45013 Mailing: U.S. Department of Energy 10995 Hamilton-Cleves Hwy. Harrison, OH 45030 U.S. Department of Energy Contractor S.M. Stoller Corporation 10995 Hamilton-Cleves Hwy. Harrison, OH 45030

394

Flat Directions and Baryogenesis in Supersymmetric Theories  

E-Print Network [OSTI]

Flat directions are a generic feature of supersymmetric theories. They are of cosmological interest because they can lead to coherent production of scalars. In the early universe such flat directions could be dangerous due to the potentially large energy density and the late decay of the associated scalars when they have only $1/M_p$ couplings (Polonyi problem). On the other hand, flat directions among the standard model fields can carry baryon number and lead to a possible mechanism for baryogenesis (Affleck Dine baryogenesis). When considering the cosmological consequences of the flat directions, it is important to take into account the soft potential with curvature of order the Hubble constant due to supersymmetry breaking in the early universe. In this talk, we discuss flat directions, their potential cosmological implications focusing on Affleck-Dine baryogenesis, and how the standard picture of their evolution must be modified in the presence of the large supersymmetry breaking in the early universe.

Lisa Randall

1995-07-08T23:59:59.000Z

395

X-AND W-BAND EPR SPECTROSCOPY COMBINED WITH MOLECULAR DYNAMICS SIMULATIONS UNRAVEL THE STRUCTURE AND STRUCTURAL  

E-Print Network [OSTI]

X- AND W-BAND EPR SPECTROSCOPY COMBINED WITH MOLECULAR DYNAMICS SIMULATIONS UNRAVEL THE STRUCTURE (EPR) spectroscopy is combined with molecular dynamics (MD) simulations to study the structure and thus the EPR spectral line shape contain direct information about the secondary and tertiary structure

Steinhoff, Heinz-Jürgen

396

NDCX-II target experiments and simulations  

Science Journals Connector (OSTI)

Abstract The ion accelerator NDCX-II is undergoing commissioning at Lawrence Berkeley National Laboratory (LBNL). Its principal mission is to explore ion-driven High Energy Density Physics (HEDP) relevant to Inertial Fusion Energy (IFE) especially in the Warm Dense Matter (WDM) regime. We have carried out hydrodynamic simulations of beam-heated targets for parameters expected for the initial configuration of NDCX-II. For metal foils of order one micron thick (thin targets), the beam is predicted to heat the target in a timescale comparable to the hydrodynamic expansion time for experiments that infer material properties from measurements of the resulting rarefaction wave. We have also carried out hydrodynamic simulations of beam heating of metallic foam targets several tens of microns thick (thick targets) in which the ion range is shorter than the areal density of the material. In this case shock waves will form and we derive simple scaling laws for the efficiency of conversion of ion energy into kinetic energy of fluid flow. Geometries with a tamping layer may also be used to study the merging of a tamper shock with the end-of-range shock. This process can occur in tamped, direct drive IFE targets.

J.J. Barnard; R.M. More; M. Terry; A. Friedman; E. Henestroza; A. Koniges; J.W. Kwan; A. Ng; P.A. Ni; W. Liu; B.G. Logan; E. Startsev; A. Yuen

2014-01-01T23:59:59.000Z

397

Carderock Tow Tank 2 | Open Energy Information  

Open Energy Info (EERE)

2 2 Overseeing Organization United States Naval Surface Warfare Center Hydrodynamic Testing Facility Type Tow Tank Length(m) 574.9 Beam(m) 15.5 Depth(m) 6.7 Water Type Freshwater Cost(per day) Contact POC Special Physical Features Carriage 2 is located on this basin Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 10.3 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.6 Maximum Wave Length(m) 12.2 Wave Period Range(s) 0.0 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wavemaking Description Irregular waves with a spectrum resembling typical ocean wave patterns with appropriate scale reductions Wave Direction Uni-Directional Simulated Beach Yes Description of Beach The wave absorber spans the full width of the basin at the end opposite the wavemaker dome, the absorbers are a discontinuous 12 degree slope type made up of 12 permeable layers of rectangular precast concrete bar panels resting on an impermeable concrete slab supported by a structural steel framework, the center section of the absorber is of wood construction & can be raised and lowered as a unit to provide model access to and from the fitting-out dry dock located at the end of the basin.

398

Chase Tow Tank | Open Energy Information  

Open Energy Info (EERE)

Chase Tow Tank Chase Tow Tank Jump to: navigation, search Basic Specifications Facility Name Chase Tow Tank Overseeing Organization University of New Hampshire Hydrodynamics Hydrodynamic Testing Facility Type Tow Tank Length(m) 36.6 Beam(m) 3.7 Depth(m) 2.4 Cost(per day) Contact POC Towing Capabilities Towing Capabilities Yes Maximum Velocity(m/s) 2.5 Length of Effective Tow(m) 20.0 Wavemaking Capabilities Wavemaking Capabilities Yes Maximum Wave Height(m) 0.4 Maximum Wave Height(m) at Wave Period(s) 3.1 Wave Period Range(s) 3.1 Current Velocity Range(m/s) 0.0 Programmable Wavemaking Yes Wave Direction Uni-Directional Simulated Beach No Channel/Tunnel/Flume Channel/Tunnel/Flume None Wind Capabilities Wind Capabilities None Control and Data Acquisition Description National Instruments LabView-based data acquistion software/components. Optical measurement system for observing kinematics of a model under test in the wave mode.

399

Modeling & Simulation - GCTool  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

GCTool Computer Model Helps Focus Fuel Cell Vehicle Research Somewhere near Detroit, an automotive engineer stares at the ceiling, wondering how to squeeze 1% more efficiency out of the fuel cell reformer she's been working on. Never mind 5% more from the next component on her list. Computer software, such as Argonne's GCTool, lets designers "try out" different system configurations, without the expense and delays of actually building numerous prototypes. Our engineer could learn that she's been worrying about the wrong thing. Argonne systems analysts have shown that in fuel cell systems for vehicles, more is not always better. For example, increasing the efficiency of the fuel processor (the component that converts hydrocarbon fuel into hydrogen for the fuel cell) may actually lower the overall system efficiency. "They go in opposite directions. You can make the fuel processor more efficient, but that's because you're stealing energy from somewhere else in the system," says Argonne's Romesh Kumar, who leads Argonne's fuel cell modeling efforts.

400

Program Peer Review New Directions | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Peer Review New Directions Program Peer Review New Directions BETO Program Peer Review - New Directions, 2013 programmanagementreview2013directionsreed.pdf More Documents &...

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Contrasting the direct radiative effect and direct radiative forcing of aerosols  

E-Print Network [OSTI]

The direct radiative effect (DRE) of aerosols, which is the instantaneous radiative impact of all atmospheric particles on the Earth's energy balance, is sometimes confused with the direct radiative forcing (DRF), which ...

Heald, Colette L.

402

Direct-Current Resistivity Survey At Walker-Lane Transitional Zone Region  

Open Energy Info (EERE)

Pritchett, 2004) Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Direct-Current Resistivity Survey At Walker-Lane Transitional Zone Region (Pritchett, 2004) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Direct-Current Resistivity Survey Activity Date Usefulness useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

403

Direct-Current Resistivity Survey At Northern Basin & Range Region  

Open Energy Info (EERE)

Region Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Direct-Current Resistivity Survey At Northern Basin & Range Region (Pritchett, 2004) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Direct-Current Resistivity Survey Activity Date Usefulness useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The 300-meter heat flow holes are essentially useless for finding the "hidden" reservoirs. Clearly, the best results are obtained from the SP and MT surveys, with DC resistivity a close third. It is concluded that the best

404

The Xygra gun simulation tool.  

SciTech Connect (OSTI)

Inductive electromagnetic launchers, or coilguns, use discrete solenoidal coils to accelerate a coaxial conductive armature. To date, Sandia has been using an internally developed code, SLINGSHOT, as a point-mass lumped circuit element simulation tool for modeling coilgun behavior for design and verification purposes. This code has shortcomings in terms of accurately modeling gun performance under stressful electromagnetic propulsion environments. To correct for these limitations, it was decided to attempt to closely couple two Sandia simulation codes, Xyce and ALEGRA, to develop a more rigorous simulation capability for demanding launch applications. This report summarizes the modifications made to each respective code and the path forward to completing interfacing between them.

Garasi, Christopher Joseph; Lamppa, Derek C.; Aubuchon, Matthew S.; Shirley, David Noyes; Robinson, Allen Conrad; Russo, Thomas V.

2008-12-01T23:59:59.000Z

405

Statutes, Regulations, and Directives for Classification Program |  

Broader source: Energy.gov (indexed) [DOE]

Classification » Statutes, Regulations, and Directives Classification » Statutes, Regulations, and Directives for Classification Program Statutes, Regulations, and Directives for Classification Program Classification Atomic Energy Act of 1954 - Establishes Government-wide policies for classifying, safeguarding, and declassifying Restricted Data information. 10 CFR Part 1045, Nuclear Classification and Declassification - Establishes the Government-wide policies and procedures for implementing sections 141 and 142 of the Atomic Energy Act of 1954 for classifying and declassifying RD and FRD and implements those requirements of Executive Order 12958 concerning NSI that affect the public. Executive Order 13526, Classified National Security Information - Prescribes the Government-wide system for classifying, safeguarding, and

406

Directional excitation of graphene surface plasmons  

E-Print Network [OSTI]

We propose a scheme to directionally couple light into graphene plasmons by placing a graphene sheet on a magneto-optical substrate. When a magnetic field is applied parallel to the surface, the graphene plasmon dispersion relation becomes asymmetric in the forward and backward directions. It is possible to achieve unidirectional excitation of graphene plasmons with normally incident illumination by applying a grating to the substrate. The directionality can be actively controlled by electrically gating the graphene, or by varying the magnetic bias. This scheme may have applications in graphene-based opto-electronics and sensing.

Liu, Fangli; Chong, Y D

2014-01-01T23:59:59.000Z

407

Direct Observation of the Oxygenated Species during Oxygen Reduction on a  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct Observation of the Oxygenated Species during Oxygen Reduction on a Direct Observation of the Oxygenated Species during Oxygen Reduction on a Platinum Fuel Cell Cathode Friday, December 20, 2013 Fuel Cell Figure 1 Figure 1. In situ x-ray spectroscopy identification and DFT simulations of oxygenated intermediates on a platinum fuel-cell cathode. The study shows that two types of hydroxyl intermediates (non-hydrated OH and hydrated OH) with distinct activities coexist on a fuel-cell cathode. The performance of polymer-electrolyte-membrane (PEM) fuel cells is limited by the reduction at the cathode of various oxygenated intermediates in the four-electron pathway of the oxygen reduction reaction. A research team led by SLAC scientists performed x-ray spectroscopy identification and DFT simulations of oxygenated intermediates on a platinum fuel-cell cathode

408

RADIATION MAGNETOHYDRODYNAMIC SIMULATIONS OF PROTOSTELLAR COLLAPSE: PROTOSTELLAR CORE FORMATION  

SciTech Connect (OSTI)

We report the first three-dimensional radiation magnetohydrodynamic (RMHD) simulations of protostellar collapse with and without Ohmic dissipation. We take into account many physical processes required to study star formation processes, including a realistic equation of state. We follow the evolution from molecular cloud cores until protostellar cores are formed with sufficiently high resolutions without introducing a sink particle. The physical processes involved in the simulations and adopted numerical methods are described in detail. We can calculate only about one year after the formation of the protostellar cores with our direct three-dimensional RMHD simulations because of the extremely short timescale in the deep interior of the formed protostellar cores, but successfully describe the early phase of star formation processes. The thermal evolution and the structure of the first and second (protostellar) cores are consistent with previous one-dimensional simulations using full radiation transfer, but differ considerably from preceding multi-dimensional studies with the barotropic approximation. The protostellar cores evolve virtually spherically symmetric in the ideal MHD models because of efficient angular momentum transport by magnetic fields, but Ohmic dissipation enables the formation of the circumstellar disks in the vicinity of the protostellar cores as in previous MHD studies with the barotropic approximation. The formed disks are still small (less than 0.35 AU) because we simulate only the earliest evolution. We also confirm that two different types of outflows are naturally launched by magnetic fields from the first cores and protostellar cores in the resistive MHD models.

Tomida, Kengo [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)] [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States); Tomisaka, Kohji [Department of Astronomical Science, The Graduate University for Advanced Studies (SOKENDAI), Osawa, Mitaka, Tokyo 181-8588 (Japan)] [Department of Astronomical Science, The Graduate University for Advanced Studies (SOKENDAI), Osawa, Mitaka, Tokyo 181-8588 (Japan); Matsumoto, Tomoaki [Faculty of Humanity and Environment, Hosei University, Fujimi, Chiyoda-ku, Tokyo 102-8160 (Japan)] [Faculty of Humanity and Environment, Hosei University, Fujimi, Chiyoda-ku, Tokyo 102-8160 (Japan); Hori, Yasunori; Saigo, Kazuya [National Astronomical Observatory of Japan, Osawa, Mitaka, Tokyo 181-8588 (Japan)] [National Astronomical Observatory of Japan, Osawa, Mitaka, Tokyo 181-8588 (Japan); Okuzumi, Satoshi [Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602 (Japan)] [Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602 (Japan); Machida, Masahiro N., E-mail: tomida@astro.princeton.edu, E-mail: tomisaka@th.nao.ac.jp, E-mail: yasunori.hori@nao.ac.jp, E-mail: saigo.kazuya@nao.ac.jp, E-mail: matsu@hosei.ac.jp, E-mail: okuzumi@nagoya-u.jp, E-mail: machida.masahiro.018@m.kyushu-u.ac.jp [Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University, Hakozaki, Higashi-ku, Fukuoka 812-8581 (Japan)

2013-01-20T23:59:59.000Z

409

Massively Parallel Spectral Element Large Eddy Simulation of a Turbulent Channel Using Wall Models  

E-Print Network [OSTI]

the strength and ability to push forward and succeed. I owe you guys everything and nobody could ask for a better family. I love you all. iv NOMENCLATURE CFD Computational Fluid Dynamics DNS Direct Numerical Simulation RANS Reynolds Averaged Navier...-Stokes LES Large Eddy Simulation FEM Finite Element Method SEM Spectral Element Method SGS Sub-Grid Scale TLM Two Layer Method Re Reynolds Number Re Friction Reynolds Number U1 Characteristic Velocity GLL Gauss-Lobatto-Legendre Cs Smagorinski Coe...

Rabau, Joshua I

2013-05-01T23:59:59.000Z

410

EA-280-B Direct Energy Marketing Inc | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

-B Direct Energy Marketing Inc EA-280-B Direct Energy Marketing Inc Order authorizing Direct Energy Marketing Inc to export electric energy to Canada. EA-280-B Direct Energy...

411

EA-280-A Direct Energy Marketing Inc | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

-A Direct Energy Marketing Inc EA-280-A Direct Energy Marketing Inc Order authorizing Direct Energy Marketing Inc to export electric energy to Canada. EA-280-A Direct Energy...

412

Challenges in Merger Simulation Analysis  

E-Print Network [OSTI]

In this paper, we share our experience with merger simulations using a Random Coefficient Logit model on the demand side and assuming a static Bertrand game on the supply side. Drawing largely from our work in Knittel and ...

Knittel, Christopher Roland

413

Adaptive Sampling in Hierarchical Simulation  

SciTech Connect (OSTI)

We propose an adaptive sampling methodology for hierarchical multi-scale simulation. The method utilizes a moving kriging interpolation to significantly reduce the number of evaluations of finer-scale response functions to provide essential constitutive information to a coarser-scale simulation model. The underlying interpolation scheme is unstructured and adaptive to handle the transient nature of a simulation. To handle the dynamic construction and searching of a potentially large set of finer-scale response data, we employ a dynamic metric tree database. We study the performance of our adaptive sampling methodology for a two-level multi-scale model involving a coarse-scale finite element simulation and a finer-scale crystal plasticity based constitutive law.

Knap, J; Barton, N R; Hornung, R D; Arsenlis, A; Becker, R; Jefferson, D R

2007-07-09T23:59:59.000Z

414

Heat Recovery Steam Generator Simulation  

E-Print Network [OSTI]

The paper discusses the applications of Heat Recovery Steam Generator Simulation. Consultants, plant engineers and plant developers can evaluate the steam side performance of HRSGs and arrive at the optimum system which matches the needs...

Ganapathy, V.

415

A Parallel Quantum Computer Simulator  

E-Print Network [OSTI]

A Quantum Computer is a new type of computer which can efficiently solve complex problems such as prime factorization. A quantum computer threatens the security of public key encryption systems because these systems rely on the fact that prime factorization is computationally difficult. Errors limit the effectiveness of quantum computers. Because of the exponential nature of quantum com puters, simulating the effect of errors on them requires a vast amount of processing and memory resources. In this paper we describe a parallel simulator which accesses the feasibility of quantum computers. We also derive and validate an analytical model of execution time for the simulator, which shows that parallel quantum computer simulation is very scalable.

Kevin M. Obenland; Alvin M. Despain

1998-04-16T23:59:59.000Z

416

Simulating Afterburn with LLNL Hydrocodes  

SciTech Connect (OSTI)

Presented here is a working methodology for adapting a Lawrence Livermore National Laboratory (LLNL) developed hydrocode, ALE3D, to simulate weapon damage effects when afterburn is a consideration in the blast propagation. Experiments have shown that afterburn is of great consequence in enclosed environments (i.e. bomb in tunnel scenario, penetrating conventional munition in a bunker, or satchel charge placed in a deep underground facility). This empirical energy deposition methodology simulates the anticipated addition of kinetic energy that has been demonstrated by experiment (Kuhl, et. al. 1998), without explicitly solving the chemistry, or resolving the mesh to capture small-scale vorticity. This effort is intended to complement the existing capability of either coupling ALE3D blast simulations with DYNA3D or performing fully coupled ALE3D simulations to predict building or component failure, for applications in National Security offensive strike planning as well as Homeland Defense infrastructure protection.

Daily, L D

2004-06-11T23:59:59.000Z

417

The simulation system SIMPLEX II  

E-Print Network [OSTI]

in the response of the model. Sensitivity analysis can determine regions of instability in the parameter range space and therefore point to parameters, which have to be estimated with increased care. Using a stochastic simulation model we will demonstrate how...

Schinagl, Josef Georg

1995-01-01T23:59:59.000Z

418

A robotic crawler exploiting directional frictional interactions: experiments, numerics, and derivation of a reduced model  

E-Print Network [OSTI]

We present experimental and numerical results for a model crawler which is able to extract net positional changes from reciprocal shape changes, i.e. 'breathing-like' deformations, thanks to directional, frictional interactions with a textured solid substrate, mediated by flexible inclined feet. We also present a simple reduced model that captures the essential features of the kinematics and energetics of the gait, and compare its predictions with the results from experiments and from numerical simulations.

Giovanni Noselli; Antonio DeSimone

2014-08-26T23:59:59.000Z

419

Laboratory Directed Research & Development (LDRD) Day  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Programs » Programs » Laboratory Directed Research & Development » Laboratory Directed R&D Day Laboratory Directed Research and Development Day National security depends on science and technology. The United States relies on Los Alamos National Laboratory for the best of both. No place on Earth pursues a broader array of world-class scientific endeavors. Contact Andrea Maestas LDRD Program (505) 667-1230 Email LDRD Day 2012 Learn how LDRD innovations benefit our nation Los Alamos National Laboratory hosted its fourth annual Laboratory Directed Research and Development (LDRD) Day on October 23, 2012, at Buffalo Thunder in Pojoaque, New Mexico. More than 30 scientists and engineers from the Lab presented posters about their LDRD projects, answering questions and

420

Maps and Directions | Savannah River Ecology Laboratory  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Maps and Directions SREL Conference Center map From the intersection of Hwy 19 and Hwy 278, go east on 278. After 3.5 miles a gravel road will appear on the left, marked by a low...

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Microsoft Word - wind direction vane1.doc  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Understanding Wind Direction And Making A Wind Vane Grade Levels: Kindergarten, 1, 2, and 3 Objectives: The students will learn how to construct a wind vane and understand the...

422

RANDOMIZED SPARSE DIRECT SOLVERS 1. Introduction. Large ...  

E-Print Network [OSTI]

a variety of techniques, such as some graph methods, the inclusion of additional structures, ... potential to be generalized to matrix-free sparse direct solvers based on ...... tions with modest accuracy, using the adaptive Algorithm 5 in MATLAB.

2013-03-21T23:59:59.000Z

423

Geothermal Direct-Use Minimizing Solid Waste  

Broader source: Energy.gov [DOE]

Aquaculture and horticulture businesses, and other industries that use geothermal direct-use systems typically don't generate any more solid waste than those that use other energy resources.

424

Unstructured Direct Elicitation of Decision Rules  

E-Print Network [OSTI]

We investigate the feasibility of unstructured direct-elicitation (UDE) of decision rules consumers use to form consideration sets. With incentives to think hard and answer truthfully, tested formats ask respondents to ...

Ding, Min

425

DIRECTED ENERGY WEAPONS (DEWs): A BIBLIOGRAPHY  

E-Print Network [OSTI]

, 1980, v, 113, no. 5, p. 60-63. "AF Phillips Lab Looks at Space as Battleground." BMD Monitor, September on Blinding Laser Weapons." Laser Focus World, December 1995, v. 31, p. 62-64. Armstrong, Richard B. "Directed

426

Future Directions in Engines and Fuels  

Broader source: Energy.gov (indexed) [DOE]

Conference Future Direction in Engines and Fuels Mobility industry Challenges - CARB GHG Scenario CARB Board hearing Dec. 2009 GHG 1 GHG 2 GHG 0 September 28, 2010 0 40 80...

427

Legal safeguards for direct investments in LDCs  

Science Journals Connector (OSTI)

The developing countries are caught in the cleft stick of assertion of national interests and independence, on one side, and need for an improved investment climate to attract foreign direct investment, on the ot...

Heiner Jttner

1976-09-01T23:59:59.000Z

428

Geothermal direct use engineering and design guidebook  

SciTech Connect (OSTI)

The Geothermal Direct Use Engineering and Design Guidebook is designed to be a comprehensive, thoroughly practical reference guide for engineers and designers of direct heat projects. These projects could include the conversion of geothermal energy into space heating and cooling of buildings, district heating, greenhouse heating, aquaculture and industrial processing. The Guidebook is directed at understanding the nature of geothermal resources and the exploration of the resources, fluid sampling techniques, drilling, and completion of geothermal wells through well testing, and reservoir evaluation. It presents information useful to engineers on the specification of equipment including well pumps, piping, heat exchangers, space heating equipment, heat pumps and absorption refrigeration. A compilation of current information about greenhouse aquaculture and industrial applications is included together with a discussion of engineering cost analysis, regulation requirements, and environmental consideration. The purpose of the Guidebook is to provide an integrated view for the development of direct use projects for which there is a very large potential in the United States.

Lienau, P.J.; Lunis, B.C. (eds.)

1991-01-01T23:59:59.000Z

429

News & Updates - DOE Directives, Delegations, and Requirements  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cancellation of Directives Document Actions NEW - DOE O 422.1 Admin Chg 2, Conduct of Operations by Diane Johnson The objective of this Order is to define the requirements for...

430

Direct Energy Services (Illinois) | Open Energy Information  

Open Energy Info (EERE)

Direct Energy Services Place: Illinois References: EIA Form EIA-861 Final Data File for 2010 - File220101 EIA Form 861 Data Utility Id 54820 This article is a stub. You can help...

431

Geothermal direct use engineering and design guidebook  

SciTech Connect (OSTI)

The Geothermal Direct Use Engineering and Design Guidebook is designed to be a comprehensive, thoroughly practical reference guide for engineers and designers of direct heat projects. These projects could include the conversion of geothermal energy into space heating cooling of buildings, district heating, greenhouse heating, aquaculture and industrial processing. The Guidebook is directed at understanding the nature of geothermal resources and the exploration of these resources, fluid sampling techniques, drilling, and completion of geothermal wells through well testing, and reservoir evaluation. It presents information useful to engineers on the specification of equipment including well pumps, piping, heat exchangers, space heating equipment, heat pumps and absorption refrigeration. A compilation of current information about greenhouse, aquaculture and industrial applications is included together with a discussion of engineering cost analysis, regulation requirements, and environmental considerations. The purpose of the Guidebook is to provide an integrated view for the development of direct use projects for which there is a very potential in the United States.

Bloomquist, R.G.; Culver, G.; Ellis, P.F.; Higbee, C.; Kindle, C.; Lienau, P.J.; Lunis, B.C.; Rafferty, K.; Stiger, S.; Wright, P.M.

1989-03-01T23:59:59.000Z

432

Direct optimization overly optimizes data Kazunori Yoshizawa  

E-Print Network [OSTI]

OPINION Direct optimization overly optimizes data Kazunori Yoshizawa Systematic Entomology optimization is a criterion that recognizes sequence alignment and tree search as a single epistemological optimization criterion, all data partitions are combined and optimized simultaneously along with the same tree

Yoshizawa, Kazunori

433

Solaire Direct SA | Open Energy Information  

Open Energy Info (EERE)

large PV installations, and distributes and installs fully debt-financed turnkey BIPV systems. References: Solaire Direct SA1 This article is a stub. You can help OpenEI...

434

Reference book on geothermal direct use  

SciTech Connect (OSTI)

This report presents the direct uses of geothermal energy in the United States. Topics discussed include: low-temperature geothermal energy resources; energy reserves; geothermal heat pumps; geothermal energy for residential buildings; and geothermal energy for industrial usage.

Lienau, P.J.; Lund, J.W.; Rafferty, K.; Culver, G.

1994-08-01T23:59:59.000Z

435

Investigation of Direct Injection Vehicle Particulate Matter...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Emissions This study focuses primarily on particulate matter mass analysis of a gasoline direct injection engine in a test cell with a chassis dynamometer. p-10gibbs.pdf...

436

Improving NCC-based direct visual tracking  

Science Journals Connector (OSTI)

Direct visual tracking can be impaired by changes in illumination if the right choice of similarity function and photometric model is not made. Tracking using the sum of squared differences, for instance, often needs to be coupled with a photometric ...

Glauco Garcia Scandaroli; Maxime Meilland; Rogrio Richa

2012-10-01T23:59:59.000Z

437

Extension of DOE Directives on Security  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

The Notice extends the following directives until 12/31/02. DOE N 205.1, DOE N 205.2, DOE 205.3, DOE N 471.3, and DOE 473.6.

2002-05-06T23:59:59.000Z

438

CANDU safety-status and direction  

SciTech Connect (OSTI)

This paper reviews the status and direction of Canada deuterium uranium (CANDU) safety design for the current CANDU product line, with emphasis on the single-unit containment plants.

Snell, V.G.; Allen, P.J. (Atomic Energy of Canada Limited, Sheridan Park (Canada))

1993-01-01T23:59:59.000Z

439

Terascale Simulation Tools and Technologies  

SciTech Connect (OSTI)

We report the development of front tracking method as a simulation tool and technology for the computation on several important SciDAC and SciDAC associated applications. The progress includes the extraction of an independent software library from the front tracking code, conservative front tracking, applications of front tracking to the simulation of fusion pellet injection in a magnetically confined plasma, the study of a fuel injection jet, and the study of fluid chaotic mixing, among other problems.

Li, Xiaolin

2007-03-09T23:59:59.000Z

440

Numerical simulation of hydraulic fracturing  

E-Print Network [OSTI]

NUMERICAL SIMULATION OF HYDRAULIC FRACTURING A Thesis by JOSEPH BARNES WARNER Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1987 Maj or Subj ect...: Petroleum Engineering NUMERICAL SIMULATION OF HYDRAULIC FRACTURING A Thesis by JOSEPH BARNES WARNER Approved as to style and content by: S. A. Holditch (Chairman of Committee) D. D. Van Fleet (member) J. E. Russell (m be ) W. D. Von onten ( ead...

Warner, Joseph Barnes

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Approximate von Neumann entropy for directed graphs  

Science Journals Connector (OSTI)

In this paper, we develop an entropy measure for assessing the structural complexity of directed graphs. Although there are many existing alternative measures for quantifying the structural properties of undirected graphs, there are relatively few corresponding measures for directed graphs. To fill this gap in the literature, we explore an alternative technique that is applicable to directed graphs. We commence by using Chung's generalization of the Laplacian of a directed graph to extend the computation of von Neumann entropy from undirected to directed graphs. We provide a simplified form of the entropy which can be expressed in terms of simple node in-degree and out-degree statistics. Moreover, we find approximate forms of the von Neumann entropy that apply to both weakly and strongly directed graphs, and that can be used to characterize network structure. We illustrate the usefulness of these simplified entropy forms defined in this paper on both artificial and real-world data sets, including structures from protein databases and high energy physics theory citation networks.

Cheng Ye; Richard C. Wilson; Csar H. Comin; Luciano da F. Costa; Edwin R. Hancock

2014-05-12T23:59:59.000Z

442

THE VECTOR DIRECTION OF THE INTERSTELLAR MAGNETIC FIELD OUTSIDE THE HELIOSPHERE  

SciTech Connect (OSTI)

We propose that magnetic reconnection at the heliopause (HP) only occurs where the interstellar magnetic field points nearly anti-parallel to the heliospheric field. By using large-scale magnetohydrodynamic (MHD) simulations of the heliosphere to provide the initial conditions for kinetic simulations of HP reconnection, we show that the energetic pickup ions downstream from the solar wind termination shock induce large diamagnetic drifts in the reconnecting plasma and stabilize non-anti-parallel reconnection. With this constraint, the MHD simulations can show where HP reconnection most likely occurs. We also suggest that reconnection triggers the 2-3 kHz radio bursts that emanate from near the HP. Requiring the burst locations to coincide with the loci of anti-parallel reconnection allows us to determine, for the first time, the vector direction of the local interstellar magnetic field. We find it to be oriented toward the southern solar magnetic pole.

Swisdak, M.; Drake, J. F. [IREAP, University of Maryland, College Park, MD 20740-3511 (United States); Opher, M.; Alouani Bibi, F., E-mail: swisdak@umd.ed [Department of Physics and Astronomy, George Mason University, Fairfax, VA 22030 (United States)

2010-02-20T23:59:59.000Z

443

Alcohol effects on navigational ability using ship handling simulator  

Science Journals Connector (OSTI)

In this paper, to examine the drinking status of officers on board multiple choice questionnaires were circularized under instruction and surveyed for 118 officers. Also, with a ship handling simulator, the effect of alcohol on maritime navigational performance is studied for the three blood alcohol concentrations (BACs) levels (0.0%, 0.05% and 0.08%). The eight participants were volunteer deck officer cadets in their senior year, at least 22 years of age, with previous experience on a bridge simulator. Additional experiments were done on maritime pilots. For baseline and performance trials, participants were randomized to one of four bridge simulator scenarios according to the current and the direction of the wind. In order to study the effects of alcohol on maritime navigational ability, (1) bio-signals using electrocardiogram (ECG), (2) performance using a simulator, and (3) mental workload using NASA-TLX were measured. As a result, this study found that alcohol intake significantly impairs the physical and mental ability of the ship operator. In particular, alcohol intake was found to have a direct correlation with changes in bio-signals such as heart rate not to mention simulator performance. In addition, alcohol intake increased mental workload according to the subjective mental workload evaluation undertaken by the test subject. The result of the analysis in this study includes the limited quantitative measure of the effects of alcohol, which is a major cause of operator fatigue. Relevance to Industry The alcohol effects on navigational ability and the frequency of drunken navigation are one of important interests in the maritime industry.

Hongtae Kim; Chan-Su Yang; Bong-Wang Lee; Young-Hoon Yang; Seoungkweon Hong

2007-01-01T23:59:59.000Z

444

Building Technologies Office: House Simulation Protocols Report  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

House Simulation House Simulation Protocols Report to someone by E-mail Share Building Technologies Office: House Simulation Protocols Report on Facebook Tweet about Building Technologies Office: House Simulation Protocols Report on Twitter Bookmark Building Technologies Office: House Simulation Protocols Report on Google Bookmark Building Technologies Office: House Simulation Protocols Report on Delicious Rank Building Technologies Office: House Simulation Protocols Report on Digg Find More places to share Building Technologies Office: House Simulation Protocols Report on AddThis.com... About Take Action to Save Energy Partner With DOE Activities Solar Decathlon Building America Research Innovations Research Tools Building Science Education Climate-Specific Guidance Solution Center

445

Sandia National Laboratories: Computational Modeling & Simulation  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Simulated Wind Data for Wave Resource Characterization at US Test Sites On September 17, 2014, in Computational Modeling & Simulation, Energy, News, News & Events, Renewable...

446

Compositional changes in heavy oil steamflood simulators.  

E-Print Network [OSTI]

??The numerical simulation of heavy oil steamfloods has generally been conducted assuming that the oil is non-volatile. Reservoir simulation has traditionally ignored compositional effect s (more)

Lolley, Christopher Scott

2012-01-01T23:59:59.000Z

447

simulation-engineering | netl.doe.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Simulation Engineering Sensors & Controls Simulation Engineering High Performance Materials Innovative Energy Concepts Water Management R&D University Research CCSI NRAP Program...

448

Clot Busting Simulations Test Potential Stroke Treatment  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Clot Busting Simulations Test Potential Stroke Treatment Clot Busting Simulations Test Potential Stroke Treatment September 24, 2013 | Tags: Biological and Environmental Research...

449

Vehicle & Systems Simulation & Testing | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Vehicle & Systems Simulation & Testing Vehicle & Systems Simulation & Testing 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and...

450

Accelerated Molecular Dynamics Simulation of Thermal Desorption.  

E-Print Network [OSTI]

??Desorption is a process ubiquitous in phenomena involving surfaces. However, it has rarely been simulated on the molecular level. Molecular dynamics simulation can provide the (more)

Becker, Kelly

2008-01-01T23:59:59.000Z

451

Verification and Validation of Simulation Model  

E-Print Network [OSTI]

Verification and Validation of Simulation Model 1 Verification and Validation 2 #12;Verification · Examples ­ simulation model: open networks with exponential interarrival time distribution and uniform

Shihada, Basem

452

Laboratory Directed Research and Development Program FY 2008 Annual Report  

E-Print Network [OSTI]

was developed using the Modelica system simulation language.object-oriented language Modelica. The component models areSystems M. Wetter; "Modelica-based Modeling and Simulation

editor, Todd C Hansen

2009-01-01T23:59:59.000Z

453

Nuclear Engineering and Design 263 (2013) 3241 Contents lists available at SciVerse ScienceDirect  

E-Print Network [OSTI]

issue for nuclear power plants. In this work, temperature and velocity fluctuations in hot and cold al., 2009). Several thermal striping accidents have occurred in nuclear plants involving bothDirect Nuclear Engineering and Design journal homepage: www.elsevier.com/locate/nucengdes Large-eddy simulations

Attinger, Daniel

454

Direct power control of shunt active filter using high selectivity filter (HSF) under distorted or unbalanced conditions  

E-Print Network [OSTI]

.A. Djaffar) Abstract This paper describes the design of a new configuration of direct power control (DPC inverter voltage vector in order to minimize instantaneous active and reactive power errors using two powers by selecting the optimal switching states of the inverter. Simulation results have proved

Paris-Sud XI, Université de

455

The Implementation of Industry Foundation Classes in Simulation Tools for the Building Industry  

SciTech Connect (OSTI)

Industry Foundation Classes (IFC) provide an environment of interoperability among IFC-compliant software applications in the architecture, engineering, construction, and facilities management (AEC/FM) industry. They allow building simulation software to automatically acquire building geometry and other building data from project models created with IFC compliant CAD software. They also facilitate direct exchange of input and output data with other simulation software. This paper discusses how simulation software can be made compliant with version 1.5 of the IFC. It also describes the immediate plans for expansion of IFC and the process of definition and addition of new classes to the model.

Bazjanac, Vladimir; Crawley, Drury B.

1997-06-01T23:59:59.000Z

456

Energy performance of direct expansion air handling unit in office buildings  

Science Journals Connector (OSTI)

Abstract Buildings and their occupants generate a large amount of carbon emissions. In Korea, buildings contribute to about 30% of the total greenhouse gases emissions, and the proportion has been rapidly increasing to the level of the developed counties (i.e., more than 40% of the total emissions. A direct expansion air handling unit, of which a refrigerant is directly delivered to the heating and cooling, has a potential to save cooling and heating energy use, compared to water-based central air conditioning systems. The aim of this study is to compare heating and cooling energy uses of an identical office building but with different air conditioning systems, i.e. direct expansion and water-based air conditioning systems. Dynamic building energy simulations that reflect the actual use of a monitored building and its air handling unit operation have been conducted in this study. Simulation results show good agreement with the actual energy consumption obtained from the field measurements of the building. Our study quantifies the amount of cooling and heating energy uses saved by a direct expansion air handing unit and reveals reasons for this savings, i.e. higher energy efficiency of the unit and reduction in pump and fan energy demands.

Geun Young Yun; Jongdae Choi; Jeong Tai Kim

2014-01-01T23:59:59.000Z

457

Geothermal direct heat applications program summary  

SciTech Connect (OSTI)

The use of geothermal energy for direct heat purposes by the private sector within the US has been quite limited to date. However, there is a large potential market for thermal energy in such areas as industrial processing, agribusiness, and space/water heating of commercial and residential buildings. Technical and economic information is needed to assist in identifying prospective direct heat users and to match their energy needs to specific geothermal reservoirs. Technological uncertainties and associated economic risks can influence the user's perception of profitability to the point of limiting private investment in geothermal direct applications. To stimulate development in the direct heat area, the Department of Energy, Division of Geothermal Energy, issued two Program Opportunity Notices (PON's). These solicitations are part of DOE's national geothermal energy program plan, which has as its goal the near-term commercialization by the private sector of hydrothermal resources. Encouragement is being given to the private sector by DOE cost-sharing a portion of the front-end financial risk in a limited number of demonstration projects. The twenty-two projects summarized herein are direct results of the PON solicitations.

None

1980-04-01T23:59:59.000Z

458

LFSC - Linac Feedback Simulation Code  

SciTech Connect (OSTI)

The computer program LFSC (Simulation Code>) is a numerical tool for simulation beam based feedback in high performance linacs. The code LFSC is based on the earlier version developed by a collective of authors at SLAC (L.Hendrickson, R. McEwen, T. Himel, H. Shoaee, S. Shah, P. Emma, P. Schultz) during 1990-2005. That code was successively used in simulation of SLC, TESLA, CLIC and NLC projects. It can simulate as pulse-to-pulse feedback on timescale corresponding to 5-100 Hz, as slower feedbacks, operating in the 0.1-1 Hz range in the Main Linac and Beam Delivery System. The code LFSC is running under Matlab for MS Windows operating system. It contains about 30,000 lines of source code in more than 260 subroutines. The code uses the LIAR ('Linear Accelerator Research code') for particle tracking under ground motion and technical noise perturbations. It uses the Guinea Pig code to simulate the luminosity performance. A set of input files includes the lattice description (XSIF format), and plane text files with numerical parameters, wake fields, ground motion data etc. The Matlab environment provides a flexible system for graphical output.

Ivanov, Valentin; /Fermilab

2008-05-01T23:59:59.000Z

459

Stochastic models: theory and simulation.  

SciTech Connect (OSTI)

Many problems in applied science and engineering involve physical phenomena that behave randomly in time and/or space. Examples are diverse and include turbulent flow over an aircraft wing, Earth climatology, material microstructure, and the financial markets. Mathematical models for these random phenomena are referred to as stochastic processes and/or random fields, and Monte Carlo simulation is the only general-purpose tool for solving problems of this type. The use of Monte Carlo simulation requires methods and algorithms to generate samples of the appropriate stochastic model; these samples then become inputs and/or boundary conditions to established deterministic simulation codes. While numerous algorithms and tools currently exist to generate samples of simple random variables and vectors, no cohesive simulation tool yet exists for generating samples of stochastic processes and/or random fields. There are two objectives of this report. First, we provide some theoretical background on stochastic processes and random fields that can be used to model phenomena that are random in space and/or time. Second, we provide simple algorithms that can be used to generate independent samples of general stochastic models. The theory and simulation of random variables and vectors is also reviewed for completeness.

Field, Richard V., Jr.

2008-03-01T23:59:59.000Z

460

No-Arbitrage ROM simulation  

Science Journals Connector (OSTI)

Abstract Ledermann et al. (2011) propose random orthogonal matrix (ROM) simulation for generating multivariate samples matching means and covariances exactly. Its computational efficiency compared to standard Monte Carlo methods makes it an interesting alternative. In this paper we enhance this method?s attractiveness by focusing on applications in finance. Many financial applications require simulated asset returns to be free of arbitrage opportunities. We analytically derive no-arbitrage bounds for expected excess returns to be used in the context of ROM simulation, and we establish the theoretical relation between the number of states (i.e., the sample size) and the size of (no-)arbitrage regions. Based on these results, we present a No-Arbitrage ROM simulation algorithm, which generates arbitrage-free random samples by purposefully rotating a simplex. Hence, the proposed algorithm completely avoids any need for checking samples for arbitrage. Compared to the alternative of (potentially frequent) re-sampling followed by arbitrage checks, it is considerably more efficient. As a by-product, we provide interesting geometrical insights into affine transformations associated with the No-Arbitrage ROM simulation algorithm.

Alois Geyer; Michael Hanke; Alex Weissensteiner

2014-01-01T23:59:59.000Z

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While these samples are representative of the content of NLEBeta,
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to obtain the most current and comprehensive results.


461

The hybrid plant concept: Combining direct and indirect coal liquefaction processes  

SciTech Connect (OSTI)

The objective of this study is to assess the technical and economic impacts of siting direct two-stage coal liquefaction and indirect liquefaction, using slurry Fischer-Tropsch (F-T) reactors, at the same location. The incentives for this co-siting include the sharing of the large number of common unit process operations and the potential blending of the very different, but complementary, products from the two processes, thereby reducing the refining required to produce specification transportation fuels. Both direct and indirect coal liquefaction share a large number of unit operations. This paper reports on the results of a study that attempts to quantify the extent of these potential synergisms by estimating the costs of transportation fuels produced by direct liquefaction, indirect liquefaction, and by combined direct and indirect hybrid plant configuration under comparable conditions. The technical approach used was to combine the MITRE computer simulated coal liquefaction models for the direct and indirect systems into one integrated model. An analysis of refining and blending of the raw product streams to produce specification diesel and gasoline fuels was included in the direct, indirect and hybrid models so that comparable product slates could be developed. 8 refs., 8 figs., 2 tabs.

Gray, D.; Tomlinson, G.C.; El Sawy, A. (Mitre Corp., McLean, VA (USA))

1990-01-01T23:59:59.000Z

462

Direct-Current Resistivity Survey At Nw Basin & Range Region (Pritchett,  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Direct-Current Resistivity Survey At Nw Basin & Range Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Direct-Current Resistivity Survey At Nw Basin & Range Region (Pritchett, 2004) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Direct-Current Resistivity Survey Activity Date Usefulness useful DOE-funding Unknown Notes NOTE: These are theoretical/computer simulation tests of various methods on eight hypothetical 'model' basing-and-range geothermal systems. "The

463

Definition: Direct normal irradiance | Open Energy Information  

Open Energy Info (EERE)

normal irradiance normal irradiance (Redirected from Definition:DNI) Jump to: navigation, search Dictionary.png Direct normal irradiance the amount of solar radiation received per unit area by a surface perpendicular (normal) to the rays that come in a straight line from the direction of the sun at its current position in the sky.[1] Also Known As DNI Related Terms Solar radiation, Irradiance, Concentrating solar power, Global horizontal irradiance References ↑ http://www.3tier.com/en/support/glossary/#dni Retrie LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ved from "http://en.openei.org/w/index.php?title=Definition:Direct_normal_irradiance&oldid=423379" Category: Definitions What links here Related changes Special pages Printable version Permanent link

464

ARM - Measurement - Shortwave narrowband direct downwelling irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

downwelling irradiance downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave narrowband direct downwelling irradiance The direct unscattered radiant energy from the Sun, in a narrow band of wavelengths shorter than approximately 4 {mu}m, passing through a horizontal unit area in a downward direction. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. Field Campaign Instruments SOAR : Shipboard Oceanographic and Atmospheric Radiation

465

SQA Directives and Guidance | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

SQA Directives and Guidance SQA Directives and Guidance SQA Directives and Guidance DOE O 414.1D, Quality Assurance DOE G 414.1-4, Software Guide for use with 10 CFR 830 Subpart A, Quality Assurance Requirements, and DOE O 414.1C, Quality Assurance DOE Order O 414.1D, Quality Assurance, includes Attachment 4 addressing SQA requirements for nuclear safety applications at DOE nuclear facilities. The DOE O 414.1D was issued April 25, 2011. This Order and its associated Guide for safety software, DOE G 414.1-4, Safety Software Guide for use with 10 CFR 830 Subpart A, Quality Assurance Requirements. The Order identifies 10 software quality work activities that are to be performed using the graded approach specified in the Order. These 10 work activities are: (1) software project management, (2) software risk

466

Direct Imaging of Asymmetric Magnetization Reversal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct Imaging of Asymmetric Magnetization Reversal Print Direct Imaging of Asymmetric Magnetization Reversal Print The phenomenon of exchange bias has transformed how data is read on magnetic hard disks and created an explosion in their information storage density. However, it remains poorly understood, and even the fundamental mechanism of magnetic reversal for exchange-biased systems in changing magnetic fields is unclear. By using x-ray photoemission electron microscopy at the ALS to directly image the magnetic structure of an exchange-biased film, a team from the University of Washington and the Stanford Synchrotron Radiation Laboratory has identified separate magnetic-reversal mechanisms in the two branches of a hysteresis loop. This advance in fundamental understanding will provide new insights for developing the next generation of information storage and sensing devices where exchange bias is expected to play a critical role.

467

First Direct Observation of Spinons and Holons  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

First Direct Observation of Spinons and Holons Print First Direct Observation of Spinons and Holons Print Spin and charge are inseparable traits of an electron, but in one-dimensional solids, a 40-year-old theory predicts their separation into "collective" modes-as independent excitation quanta called spinons and holons. Angle-resolved photoemission spectroscopy (ARPES) should provide the most direct evidence of this spin-charge separation, as the single quasiparticle peak splits into a spinon-holon two-peak structure. However, despite extensive ARPES experiments, the unambiguous observation of the two-peak structure has remained elusive. Working at the ALS, a team of researchers from Korea, Japan, and the U.S. has now observed electron spin-charge separation in a one-dimensional solid. These results hold implications for future developments in several key areas of advanced technology, including high-temperature superconductors, nanowires, and spintronics.

468

First Direct Observation of Spinons and Holons  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

First Direct Observation of Spinons and Holons Print First Direct Observation of Spinons and Holons Print Spin and charge are inseparable traits of an electron, but in one-dimensional solids, a 40-year-old theory predicts their separation into "collective" modes-as independent excitation quanta called spinons and holons. Angle-resolved photoemission spectroscopy (ARPES) should provide the most direct evidence of this spin-charge separation, as the single quasiparticle peak splits into a spinon-holon two-peak structure. However, despite extensive ARPES experiments, the unambiguous observation of the two-peak structure has remained elusive. Working at the ALS, a team of researchers from Korea, Japan, and the U.S. has now observed electron spin-charge separation in a one-dimensional solid. These results hold implications for future developments in several key areas of advanced technology, including high-temperature superconductors, nanowires, and spintronics.

469

Coal Direct Chemical Looping (CDCL) Process Development  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct Chemical Looping (CDCL) Retrofit to Direct Chemical Looping (CDCL) Retrofit to Pulverized Coal Power Plants for In-Situ CO 2 Capture William G. Lowrie Department of Chemical & Biomolecular Engineering The Ohio State University Columbus, OH 43210 Award #: DE-NT0005289 PI: Liang-Shih Fan Presenter: Samuel Bayham Department of Chemical and Biomolecular Engineering The Ohio State University 2013 NETL CO2 Capture Technology Meeting July 11, 2013 Pittsburgh, PA Clean Coal Research Laboratory at The Ohio State University Sub-Pilot Scale Unit 250kW th Pilot Unit (Wilsonville, Alabama) Syngas Chemical Looping Coal-Direct Chemical Looping Cold Flow Model Sub-Pilot Scale Unit HPHT Slurry Bubble Column 120kW th Demonstration Unit Calcium Looping Process CCR Process Sub-Pilot Unit F-T Process

470

ARM - Measurement - Shortwave broadband direct normal irradiance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

normal irradiance normal irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave broadband direct normal irradiance The rate at which radiant energy in broad bands of wavelengths shorter than approximately 4{mu}m, that comes directly from the Sun without being scattered or absorbed in the atmosphere, passes through a unit area perpendicular to the direction from the Sun. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments

471

Disentangling Dark Matter Dynamics with Directional Detection  

SciTech Connect (OSTI)

Inelastic dark matter reconciles the DAMA anomaly with other null direct detection experiments and points to a non-minimal structure in the dark matter sector. In addition to the dominant inelastic interaction, dark matter scattering may have a subdominant elastic component. If these elastic interactions are suppressed at low momentum transfer, they will have similar nuclear recoil spectra to inelastic scattering events. While upcoming direct detection experiments will see strong signals from such models, they may not be able to unambiguously determine the presence of the subdominant elastic scattering from the recoil spectra alone. We show that directional detection experiments can separate elastic and inelastic scattering events and discover the underlying dynamics of dark matter models.

Lisanti, Mariangela; Wacker, Jay G.; /SLAC

2009-12-16T23:59:59.000Z

472

DIRECTIONAL DETECTION OF A NEUTRON SOURCE.  

SciTech Connect (OSTI)

Advantages afforded by the development of new directional neutron detectors and imagers are discussed. Thermal neutrons have mean free paths in air of about 20 meters, and can be effectively imaged using coded apertures. Fission spectrum neutrons have ranges greater than 100 meters, and carry enough energy to scatter at least twice in multilayer detectors which can yield both directional and spectral information. Such strategies allow better discrimination between a localized spontaneous fission source and the low, but fluctuating, level of background neutrons generated by cosmic rays. A coded aperture thermal neutron imager will be discussed as well as a proton-recoil double-scatter fast-neutron directional detector with time-of-flight energy discrimination.

VANIER, P.E.; FORMAN, L.

2006-10-23T23:59:59.000Z

473

First Direct Observation of Spinons and Holons  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

First Direct Observation of Spinons and Holons Print First Direct Observation of Spinons and Holons Print Spin and charge are inseparable traits of an electron, but in one-dimensional solids, a 40-year-old theory predicts their separation into "collective" modes-as independent excitation quanta called spinons and holons. Angle-resolved photoemission spectroscopy (ARPES) should provide the most direct evidence of this spin-charge separation, as the single quasiparticle peak splits into a spinon-holon two-peak structure. However, despite extensive ARPES experiments, the unambiguous observation of the two-peak structure has remained elusive. Working at the ALS, a team of researchers from Korea, Japan, and the U.S. has now observed electron spin-charge separation in a one-dimensional solid. These results hold implications for future developments in several key areas of advanced technology, including high-temperature superconductors, nanowires, and spintronics.

474

Directional Drilling Systems | Open Energy Information  

Open Energy Info (EERE)

Directional Drilling Systems Directional Drilling Systems Jump to: navigation, search Geothermal ARRA Funded Projects for Directional Drilling Systems Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026 further results","default":"","geoservice":"google","zoom":14,"width":"600px","height":"350px","centre":false,"layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","icon":"","visitedicon":"","forceshow":true,"showtitle":true,"hidenamespace":false,"template":false,"title":"","label":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"locations":[{"text":"

475

Direct-Cooled Power Electronics Substrate  

SciTech Connect (OSTI)

The goal of the Direct-Cooled Power Electronics Substrate project is to reduce the size and weight of the heat sink for power electronics used in hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs). The concept proposed in this project was to develop an innovative power electronics mounting structure, model it, and perform both thermal and mechanical finite-element analysis (FEA). This concept involved integrating cooling channels within the direct-bonded copper (DBC) substrate and strategically locating these channels underneath the power electronic devices. This arrangement would then be directly cooled by water-ethylene glycol (WEG), essentially eliminating the conventional heat sink and associated heat flow path. The concept was evaluated to determine its manufacturability, its compatibility with WEG, and the potential to reduce size and weight while directly cooling the DBC and associated electronics with a coolant temperature of 105 C. This concept does not provide direct cooling to the electronics, only direct cooling inside the DBC substrate itself. These designs will take into account issues such as containment of the fluid (separation from the electronics) and synergy with the whole power inverter design architecture. In FY 2008, mechanical modeling of substrate and inverter core designs as well as thermal and mechanical stress FEA modeling of the substrate designs was performed, along with research into manufacturing capabilities and methods that will support the substrate designs. In FY 2009, a preferred design(s) will be fabricated and laboratory validation testing will be completed. In FY 2010, based on the previous years laboratory testing, the mechanical design will be modified and the next generation will be built and tested in an operating inverter prototype.

Wiles, R.; Ayers, C.; Wereszczak, A.

2008-12-23T23:59:59.000Z

476

MOOSE: Multiphysics Object-Oriented Simulation Environment  

SciTech Connect (OSTI)

An overview of Idaho National Laboratory's MOOSE: Multiphysics Object-Oriented Simulation Environment

Gaston, Derek

2014-04-09T23:59:59.000Z

477

MOOSE: Multiphysics Object-Oriented Simulation Environment  

ScienceCinema (OSTI)

An overview of Idaho National Laboratory's MOOSE: Multiphysics Object-Oriented Simulation Environment

Gaston, Derek

2014-05-30T23:59:59.000Z

478

Visualization of Fuel Cell Simulations Niklas Rober  

E-Print Network [OSTI]

Simulation einer Brennstoffzelle. Dieser Datensatz ist ausserdem multimodal und besteht aus 5 Skalaren und

Zhang, Richard "Hao"

479

Modeling Asphaltene Precipitation in Reservoir Simulation  

Science Journals Connector (OSTI)

The primary goal of this study was to simulate the effects of asphaltene precipitation on miscible-gas flooding. ... We simulated three different cases to investigate the effect of asphaltene precipitation on oil production for different rock fabrics. ... (7) The simplified algorithm for asphaltene precipitation gives simulation results in agreement with simulations using the pseudo-multiphase algorithm and saves significant computational time. ...

Xiangjun Qin; Peng Wang; Kamy Sepehrnoori; Gary A. Pope

2000-06-28T23:59:59.000Z

480

Simulation Model Driven Engineering for Manufacturing Cell  

E-Print Network [OSTI]

Simulation Model Driven Engineering for Manufacturing Cell Hironori Hibino1 , Toshihiro Inukai2 Abstract. In our research, the simulation model driven engineering for manufacturing cell (SMDE on the simulation model and to extend the range of control applications and simulation applications using the PC

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "direction uni-directional simulated" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Directionally solidified materials | ornl.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Advanced Materials Advanced Materials Research Areas Research Highlights Facilities and Capabilities Science to Energy Solutions News & Awards Events and Conferences Supporting Organizations Clean Energy National Security Neutron Science Nuclear Science Supercomputing and Computation More Science Hubs, Centers and Institutes US ITER Home | Science & Discovery | Advanced Materials SHARE Directionally solidified materials May 15, 2013 A false-color image of molybdenum pillars, formed as a grid of nearly defect-free single crystal rods, sticking out of a silicon carbide matrix. Through a process known as directional solidification, ORNL researchers have grown materials with micrometer-sized nearly-perfect "pillars." When they tested these materials, they found that the pillars had strength

482

Chapter 22 - Direct Loans and Loan Guarantees  

Broader source: Energy.gov (indexed) [DOE]

8-31-11 8-31-11 22-1 CHAPTER 22 DIRECT LOANS AND LOAN GUARANTEES 1. PURPOSE. This chapter establishes the Department of Energy (DOE) accounting policy and procedures for direct loans and loan guarantees for non-Federal borrowers. 2. APPLICABILITY. a. Departmental Applicability. The applicability of this chapter is specified in Chapter 1, "Accounting Overview." b. DOE Contractors. This chapter does not apply to contractors. 3. REQUIREMENTS. a. Federal Credit Reform Act. The policies and procedures for credit programs reflect the requirements of the "Federal Credit Reform Act of 1990 (FCRA)," as amended. The FCRA is found

483

Direct CP violation in B decays  

E-Print Network [OSTI]

We review recent experimental results on direct CP violation. The hot topic is a measurement in charmless two-body decays of B0, B+. In connection to this the first analogous measurements in Bs0 and Lambda_b0 decays are now available. Furthermore first evidence for direct CP violation in B+ decays is obtained from Dalitz plot analyzes of the K+pi-pi+ final state at B-factories. The last group of discussed results probes the b -> c\\bar{c}d transition in attempt to resolve the discrepancy between Belle and BABAR experiments in CP violation in the B0 -> D+D- decays.

M. Kreps

2008-06-30T23:59:59.000Z

484

Compressive direct measurement of the quantum wavefunction  

E-Print Network [OSTI]

The direct measurement of a complex wavefunction has been recently realized by using weak-values. In this paper, we introduce a method that exploits sparsity for compressive measurement of the transverse spatial wavefunction of photons. The procedure involves a weak measurement in random projection operators in the spatial domain followed by a post-selection in the momentum basis. Using this method, we experimentally measure a 192-dimensional state with a fidelity of $90%$ using only $25$ percent of the total required measurements. Furthermore, we demonstrate measurement of a 19200 dimensional state; a task that would require an unfeasibly large acquiring time with the conventional direct measurement technique.

Mohammad Mirhosseini; Omar S. Magaa-Loaiza; Seyed Mohammad Hashemi Rafsanjani; Robert W. Boyd

2014-04-10T23:59:59.000Z

485

Secretary Directs FPO to Prepare Strategic Plan  

Broader source: Energy.gov (indexed) [DOE]

January 2004 Volume 1, Number 2 January 2004 Volume 1, Number 2 In This Issue * Executive Order Update * $1 Million for Manhattan Project Preservation * 2004 DOE Cultural Resources Forum * ES&H Cultural Resources Update * FPO Site Visits * Oak Ridge Historic Preservation Update * Featured Site: Pantex * Save America's Treasures * Manhattan Project Interactive Website * Goucher College: HP Education Opportunity * Atomic Testing Museum Moves Forward Secretary Directs FPO to Prepare Strategic Plan On December 2, 2003, Secretary of Energy Spencer Abraham directed DOE's Federal Preservation Officer, Chief Historian F. G. Gosling, to prepare a strategic plan for the Department's history and historic preservation/cultural resource management programs. The Secretary (right) gave Gosling 90

486

Special nuclear material simulation device  

DOE Patents [OSTI]

An apparatus for simulating special nuclear material is provided. The apparatus typically contains a small quantity of special nuclear material (SNM) in a configuration that simulates a much larger quantity of SNM. Generally the apparatus includes a spherical shell that is formed from an alloy containing a small quantity of highly enriched uranium. Also typically provided is a core of depleted uranium. A spacer, typically aluminum, may be used to separate the depleted uranium from the shell of uranium alloy. A cladding, typically made of titanium, is provided to seal the source. Methods are provided to simulate SNM for testing radiation monitoring portals. Typically the methods use at least one primary SNM spectral line and exclude at least one secondary SNM spectral line.

Leckey, John H.; DeMint, Amy; Gooch, Jack; Hawk, Todd; Pickett, Chris A.; Blessinger, Chris; York, Robbie L.

2014-08-12T23:59:59.000Z

487

Lattice Simulations and Infrared Conformality  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

We examine several recent lattice-simulation data sets, asking whether they are consistent with infrared conformality. We observe, in particular, that for an SU(3) gauge theory with 12 Dirac fermions in the fundamental representation, recent simulation data can be described assuming infrared conformality. Lattice simulations include a fermion mass m which is then extrapolated to zero, and we note that this data can be fit by a small-m expansion, allowing a controlled extrapolation. We also note that the conformal hypothesis does not work well for two theories that are known or expected to be confining and chirally broken, and that it does work well for another theory expected to be infrared conformal.

Appelquist, Thomas; Fleming, George T.; Lin, Meifeng; Neil, Ethan T.; Schaich, David A.

2011-09-01T23:59:59.000Z

488

A Simbol-X Event Simulator  

SciTech Connect (OSTI)

The ASI Science Data Center (ASDC) has developed an X-ray event simulator to support users (and team members) in simulation of data taken with the two cameras on board the Simbol-X X-Ray Telescope. The Simbol-X simulator is very fast and flexible, compared to ray-tracing simulator. These properties make our simulator advantageous to support the user in planning proposals and comparing real data with the theoretical expectations and for a quick detection of unexpected features. We present here the simulator outline and a few examples of simulated data.

Puccetti, S.; Giommi, P. [ASI Science data Center, via Galileo Galilei, 00044 Frascati (Italy); Fiore, F. [INAF-OAR, via Frascati 33, Monteporzio, I-00040 (Italy)

2009-05-11T23:59:59.000Z

489

Simulation of jets at colliders  

Science Journals Connector (OSTI)

Abstract We review the development of the physics behind event generators during the last decade. After a more general description of parton showers, we focus mostly on the perturbative side of the simulations. Two newer developments of parton showers, as implemented in herwig++, are described in greater detail. Matching and merging of parton showers with fixed order computations are discussed. We describe some developments of multiple partonic interactions which are relevant for the simulation of jets from the underlying event, where the implementation in herwig++ is again taken as a generic example. Finally, we compare some event generator results to collider data from LEP and the LHC.

Stefan Gieseke

2013-01-01T23:59:59.000Z

490

Application of new simulation algorithms for modeling rf diagnostics of electron clouds  

SciTech Connect (OSTI)

Traveling wave rf diagnostics of electron cloud build-up show promise as a non-destructive technique for measuring plasma density and the efficacy of mitigation techniques. However, it is very difficult to derive an absolute measure of plasma density from experimental measurements for a variety of technical reasons. Detailed numerical simulations are vital in order to understand experimental data, and have successfully modeled build-up. Such simulations are limited in their ability to reproduce experimental data due to the large separation of scales inherent to the problem. Namely, one must resolve both rf frequencies in the GHz range, as well as the plasma modulation frequency of tens of MHz, while running for very long simulations times, on the order of microseconds. The application of new numerical simulation techniques allow us to bridge the simulation scales in this problem and produce spectra that can be directly compared to experiments. The first method is to use a plasma dielectric model to measure plasma-induced phase shifts in the rf wave. The dielectric is modulated at a low frequency, simulating the effects of multiple bunch crossings. This allows simulations to be performed without kinetic particles representing the plasma, which both speeds up the simulations as well as reduces numerical noise from interpolation of particle charge and currents onto the computational grid. Secondly we utilize a port boundary condition model to simultaneously absorb rf at the simulation boundaries, and to launch the rf into the simulation. This method improves the accuracy of simulations by restricting rf frequencies better than adding an external (finite) current source to drive rf, and absorbing layers at the boundaries. We also explore the effects of non-uniform plasma densities on the simulated spectra.

Veitzer, Seth A.; Smithe, David N.; Stoltz, Peter H. [Tech-X Corporation, Boulder, CO, 80303 (United States)

2012-12-21T23:59:59.000Z

491

Monte Carlo Simulation of Massive Absorbers for Cryogenic Calorimeters  

SciTech Connect (OSTI)

There is a growing interest in cryogenic calorimeters with macroscopic absorbers for applications such as dark matter direct detection and rare event search experiments. The physics of energy transport in calorimeters with absorber masses exceeding several grams is made complex by the anisotropic nature of the absorber crystals as well as the changing mean free paths as phonons decay to progressively lower energies. We present a Monte Carlo model capable of simulating anisotropic phonon transport in cryogenic crystals. We have initiated the validation process and discuss the level of agreement between our simulation and experimental results reported in the literature, focusing on heat pulse propagation in germanium. The simulation framework is implemented using Geant4, a toolkit originally developed for high-energy physics Monte Carlo simulations. Geant4 has also been used for nuclear and accelerator physics, and applications in medical and space sciences. We believe that our current work may open up new avenues for applications in material science and condensed matter physics.

Brandt, D.; Asai, M.; Brink, P.L.; /SLAC; Cabrera, B.; /Stanford U.; Silva, E.do Couto e; Kelsey, M.; /SLAC; Leman, S.W.; McArthy, K.; /MIT; Resch, R.; Wright, D.; /SLAC; Figueroa-Feliciano, E.; /MIT

2012-06-12T23:59:59.000Z

492

Visualization and analysis of eddies in a global ocean simulation  

SciTech Connect (OSTI)

Eddies at a scale of approximately one hundred kilometers have been shown to be surprisingly important to understanding large-scale transport of heat and nutrients in the ocean. Due to difficulties in observing the ocean directly, the behavior of eddies below the surface is not very well understood. To fill this gap, we employ a high-resolution simulation of the ocean developed at Los Alamos National Laboratory. Using large-scale parallel visualization and analysis tools, we produce three-dimensional images of ocean eddies, and also generate a census of eddy distribution and shape averaged over multiple simulation time steps, resulting in a world map of eddy characteristics. As expected from observational studies, our census reveals a higher concentration of eddies at the mid-latitudes than the equator. Our analysis further shows that mid-latitude eddies are thicker, within a range of 1000-2000m, while equatorial eddies are less than 100m thick.

Williams, Sean J [Los Alamos National Laboratory; Hecht, Matthew W [Los Alamos National Laboratory; Petersen, Mark [Los Alamos National Laboratory; Strelitz, Richard [Los Alamos National Laboratory; Maltrud, Mathew E [Los Alamos National Laboratory; Ahrens, James P [Los Alamos National Laboratory; Hlawitschka, Mario [UC DAVIS; Hamann, Bernd [UC DAVIS

2010-10-15T23:59:59.000Z

493

Direct Imaging of Antiferromagnetic Vortex States  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct Imaging of Antiferromagnetic Vortex States Print Direct Imaging of Antiferromagnetic Vortex States Print Magnetic materials are characterized by the ordering of electron spins, with nearest-neighbor spins parallel to each other in ferromagnetic (FM) materials and antiparallel to each other in antiferromagnetic (AFM) materials. As the size of a magnetic system is reduced to micron scale, it has been shown that the spins in an FM microstructure can curl around to form a magnetic vortex state. While there has been intensive activity in the study of vortex states in FM disks, there has been no direct observation of such states in an AFM microstructure, although theory predicts many interesting and unique properties for the AFM vortex state. Recently, a research team from Berkeley, Korea, and China has taken the first direct image of an AFM vortex in multilayered magnetic disk structures using x-ray magnetic linear dichroism (XMLD) and photoemission electron microscopy (PEEM) at ALS Beamlines 4.0.2 and 11.0.1 , respectively. The experiments observed two types of AFM vortices, one of which has no analogue in FM vortices.

494

Direct Imaging of Antiferromagnetic Vortex States  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct Imaging of Antiferromagnetic Vortex States Print Direct Imaging of Antiferromagnetic Vortex States Print Magnetic materials are characterized by the ordering of electron spins, with nearest-neighbor spins parallel to each other in ferromagnetic (FM) materials and antiparallel to each other in antiferromagnetic (AFM) materials. As the size of a magnetic system is reduced to micron scale, it has been shown that the spins in an FM microstructure can curl around to form a magnetic vortex state. While there has been intensive activity in the study of vortex states in FM disks, there has been no direct observation of such states in an AFM microstructure, although theory predicts many interesting and unique properties for the AFM vortex state. Recently, a research team from Berkeley, Korea, and China has taken the first direct image of an AFM vortex in multilayered magnetic disk structures using x-ray magnetic linear dichroism (XMLD) and photoemission electron microscopy (PEEM) at ALS Beamlines 4.0.2 and 11.0.1 , respectively. The experiments observed two types of AFM vortices, one of which has no analogue in FM vortices.

495

Direct Imaging of Antiferromagnetic Vortex States  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Direct Imaging of Antiferromagnetic Vortex States Print Direct Imaging of Antiferromagnetic Vortex States Print Magnetic materials are characterized by the ordering of electron spins, with nearest-neighbor spins parallel to each other in ferromagnetic (FM) materials and antiparallel to each other in antiferromagnetic (AFM) materials. As the size of a magnetic system is reduced to micron scale, it has been shown that the spins in an FM microstructure can curl around to form a magnetic vortex state. While there has been intensive activity in the study of vortex states in FM disks, there has been no direct observation of such states in an AFM microstructure, although theory predicts many interesting and unique properties for the AFM vortex state. Recently, a research team from Berkeley, Korea, and China has taken the first direct image of an AFM vortex in multilayered magnetic disk structures using x-ray magnetic linear dichroism (XMLD) and photoemission electron microscopy (PEEM) at ALS Beamlines 4.0.2 and 11.0.1 , respectively. The experiments observed two types of AFM vortices, one of which has no analogue in FM vortices.

496

DemandDirect | Open Energy Information  

Open Energy Info (EERE)

DemandDirect DemandDirect Jump to: navigation, search Name DemandDirect Place Woodbury, Connecticut Zip 6798 Sector Efficiency, Renewable Energy, Services Product DemandDirect provides demand response, energy efficiency, load management, and distributed generation services to end-use electricity customers in order to reduce electricity consumption, improve grid reliability, and promote renewable energy. Coordinates 44.440496°, -72.414991° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.440496,"lon":-72.414991,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

497

Directional Spectra of Wind-Generated Waves  

Science Journals Connector (OSTI)

...H. Hui From observations of wind and of water surface elevation...the directional spectrum of wind-generated waves on deep water...inversely proportional to the fourth power of the frequency , with the...clearly dependent on the ratio of wind speed to peak wave speed...

1985-01-01T23:59:59.000Z

498

Constellation sizing for modest directed energy platforms  

SciTech Connect (OSTI)

Discussions of boost-phase, directed energy scaling have concentrated on large lasers and mirrors requiring development. This report explores modest lasers that could be deployed sooner if their performance and effectiveness were found to be adequate. 6 refs., 3 figs.

Canavan, G.H.

1989-06-01T23:59:59.000Z

499

LBNL-103E-2008 Laboratory Directed Research  

E-Print Network [OSTI]

of California. Lawrence Berkeley Laboratory is an equal opportunity employer. #12;Report on Ernest Orlando Lawrence Berkeley National Laboratory Laboratory Directed Research and Development Program FY 2008 Ernest Orlando Lawrence Berkeley National Laboratory Berkeley, CA 94720 MARCH, 2009 Prepared for the U

500

Laboratory Directed Research and Development Program  

E-Print Network [OSTI]

of California. Lawrence Berkeley Laboratory is an equal opportunity employer. #12;Report on Ernest Orlando Lawrence Berkeley National Laboratory Laboratory Directed Research and Development Program FY 2009 Ernest Orlando Lawrence Berkeley National Laboratory Berkeley, CA 94720 MARCH, 2010 Prepared for the U